innov
/
bee-tree
1
0
Fork 0
Code Issues Pull Requests 2 Projects Releases Wiki Activity

fix: 懒加载滚动后，复选框不能勾选[IFNC-1116]

This commit is contained in:
yangchch6 2020-06-12 10:54:31 +08:00
parent 1ce47cd5ae
commit 4554f26ff7
10 changed files with 169 additions and 239 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
build/Tree.js
View File

@ -101,15 +101,8 @@ var Tree = function (_React$Component) {
return _this;
}
/**
* 在 lazyload 情况下，需要获取树节点的真实高度
*/
Tree.prototype.componentDidMount = function componentDidMount() {
var lazyLoad = this.props.lazyLoad;
// 此处为了区分数据是不是异步渲染的，prevProps 作为标识
if (this.hasTreeNode()) {
this.setState({
prevProps: this.props
@ -119,14 +112,7 @@ var Tree = function (_React$Component) {
if (this.props._getTreeObj) {
this.props._getTreeObj(this);
}
// 启用懒加载，计算树节点真实高度
if (!lazyLoad) return;
var treenodes = this.tree.querySelectorAll('.u-tree-treenode-close')[0];
if (!treenodes) return;
var rowHeight = treenodes.getBoundingClientRect().height;
this.store.setState({
rowHeight: rowHeight
});
this.calculateRowHeight();
};
// 判断初始化挂载时，有没有渲染树节点
@ -230,6 +216,12 @@ var Tree = function (_React$Component) {
this.setState(st);
};
Tree.prototype.componentDidUpdate = function componentDidUpdate() {
if (!this.hasCalculateRowHeight) {
this.calculateRowHeight();
}
};
Tree.prototype.onDragStart = function onDragStart(e, treeNode) {
this.dragNode = treeNode;
this.dragNodesKeys = this.getDragNodes(treeNode);
@ -431,7 +423,7 @@ var Tree = function (_React$Component) {
var rsCheckedKeys = [];
if (checked && index === -1) {
checkedKeys.push(key);
rsCheckedKeys.push(key);
// rsCheckedKeys.push(key);//onCheck第一个参数的key不对
}
if (!checked && index > -1) {
checkedKeys.splice(index, 1);
@ -963,7 +955,9 @@ var Tree = function (_React$Component) {
Tree.prototype.renderTreeNode = function renderTreeNode(child, index) {
var level = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
var pos = level + '-' + index;
// fix: 懒加载场景，index 计算错误
var actualIndex = index + parseInt(this.startIndex);
var pos = level + '-' + actualIndex;
var key = child.key || pos;
var state = this.state;
@ -1117,7 +1111,7 @@ var Tree = function (_React$Component) {
_this6.treeNodesStates[pos] = {
siblingPosition: siblingPosition
};
});
}, undefined, startIndex);
};
if (showLine && !checkable) {
getTreeNodesStates();
@ -1150,7 +1144,7 @@ var Tree = function (_React$Component) {
_this6.treeNodesStates[pos].checked = true;
checkedPositions.push(pos);
}
});
}, undefined, startIndex);
// if the parent node's key exists, it all children node will be checked
(0, _util.handleCheckState)(this.treeNodesStates, (0, _util.filterParentPosition)(checkedPositions), true);
checkKeys = (0, _util.getCheck)(this.treeNodesStates);
@ -1202,6 +1196,20 @@ var _initialiseProps = function _initialiseProps() {
return !noTreeNode;
};
this.calculateRowHeight = function () {
var lazyLoad = _this7.props.lazyLoad;
// 启用懒加载，计算树节点真实高度
if (!lazyLoad) return;
var treenodes = _this7.tree.querySelectorAll('.u-tree-treenode-close')[0];
if (!treenodes) return;
_this7.hasCalculateRowHeight = true;
var rowHeight = treenodes.getBoundingClientRect().height;
_this7.store.setState({
rowHeight: rowHeight
});
};
this.handleTreeListChange = function (treeList, startIndex, endIndex) {
// 属性配置设置
var attr = {
@ -1218,6 +1226,7 @@ var _initialiseProps = function _initialiseProps() {
_this7.setState({
treeData: treeData
});
_this7.dataChange = true;
};
this.deepTraversal = function (treeData) {

4
build/config.js
View File

@ -9,8 +9,8 @@ Object.defineProperty(exports, "__esModule", {
// 树懒加载功能，需要用到的变量
exports["default"] = {
loadBuffer: 5, //懒加载时缓冲区数据量
loadBuffer: 20, //懒加载时缓冲区数据量
defaultRowsInView: 20, //可视区数据量
rowDiff: 3 //行差值，需要重新截取数据的阈值
rowDiff: 10 //行差值，需要重新截取数据的阈值
};
module.exports = exports["default"];

21
build/infiniteScroll.js
View File

@ -64,11 +64,9 @@ var InfiniteScroll = function (_Component) {
_this.scrollListener = function () {
var el = _this.scrollComponent;
var parentNode = _this.getParentElement(el);
_this.scrollTop = parentNode.scrollTop;
(0, _util.throttle)(_this.handleScrollY, 500)();
_this.handleScrollY();
};
_this.handleScrollY = function () {
@ -130,12 +128,7 @@ var InfiniteScroll = function (_Component) {
_this.sliceTreeList = function (startIndex, endIndex) {
var newTreeList = []; //存储截取后的新数据
// console.log(
// "**startIndex**" + startIndex,
// "**endIndex**" + endIndex
// );
newTreeList = _this.treeList.slice(startIndex, endIndex);
// console.log(JSON.stringify(newTreeList))
_this.props.handleTreeListChange && _this.props.handleTreeListChange(newTreeList, startIndex, endIndex);
};
@ -166,6 +159,12 @@ var InfiniteScroll = function (_Component) {
}
};
// componentDidUpdate() {
// const el = this.scrollComponent;
// const parentNode = this.getParentElement(el);
// parentNode.scrollTop = this.scrollTop;
// };
InfiniteScroll.prototype.componentWillUnmount = function componentWillUnmount() {
this.detachScrollListener();
this.detachMousewheelListener();
@ -247,11 +246,11 @@ var InfiniteScroll = function (_Component) {
var scrollY = scrollEl && scrollEl.clientHeight;
var rowHeight = store.getState().rowHeight;
//默认显示20条，rowsInView根据定高算的。在非固定高下，这个只是一个大概的值。
//默认显示20条，rowsInView根据定高算的。
this.rowsInView = scrollY ? Math.floor(scrollY / rowHeight) : _config2["default"].defaultRowsInView;
scrollEl.addEventListener('scroll', this.scrollListener, this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('resize', this.scrollListener, this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('scroll', (0, _util.throttle)(this.scrollListener, 150), this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('resize', (0, _util.throttle)(this.scrollListener, 150), this.options ? this.options : this.props.useCapture);
};
/**
* 滚动事件监听

62
build/util.js
View File

@ -23,7 +23,6 @@ exports.toArray = toArray;
exports.getNodeChildren = getNodeChildren;
exports.warnOnlyTreeNode = warnOnlyTreeNode;
exports.convertListToTree = convertListToTree;
exports.debounce = debounce;
exports.throttle = throttle;
var _react = require('react');
@ -130,10 +129,12 @@ function getSiblingPosition(index, len, siblingPosition) {
}
function loopAllChildren(childs, callback, parent) {
var baseNum = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;
var loop = function loop(children, level, _parent) {
var len = getChildrenlength(children);
_react2["default"].Children.forEach(children, function (item, index) {
var pos = level + '-' + index;
var pos = level + '-' + (index + parseInt(baseNum));
if (item.props.children && item.type && item.type.isTreeNode) {
loop(item.props.children, pos, { node: item, pos: pos });
}
@ -485,57 +486,24 @@ function isObject(value) {
return value != null && (type == 'object' || type == 'function');
}
/**
* 函数防抖
* @param {*} func
* @param {*} wait
* @param {*} immediate
*/
function debounce(func, wait, immediate) {
var timeout = void 0;
return function debounceFunc() {
var context = this;
var args = arguments;
// https://fb.me/react-event-pooling
if (args[0] && args[0].persist) {
args[0].persist();
}
var later = function later() {
timeout = null;
if (!immediate) {
func.apply(context, args);
}
};
var callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) {
func.apply(context, args);
}
};
}
/**
* 函数节流
* @param {*} func 延时调用函数
* @param {*} wait 延迟多长时间
* @param {*} options 至少多长时间触发一次
* @return Function 延迟执行的方法
*/
function throttle(func, wait, options) {
var leading = true;
var trailing = true;
if (typeof func !== 'function') {
throw new TypeError('Expected a function');
function throttle(fn, wait) {
var last = void 0;
return function () {
var now = Date.now();
if (!last) {
fn.apply(this, arguments);
last = now;
return;
}
if (isObject(options)) {
leading = 'leading' in options ? !!options.leading : leading;
trailing = 'trailing' in options ? !!options.trailing : trailing;
if (now - last >= wait) {
fn.apply(this, arguments);
last = now;
}
return debounce(func, wait, {
leading: leading,
trailing: trailing,
'maxWait': wait
});
};
}

133
dist/demo.js vendored
View File

@ -34383,15 +34383,8 @@
return _this;
}
/**
* 在 lazyload 情况下，需要获取树节点的真实高度
*/
Tree.prototype.componentDidMount = function componentDidMount() {
var lazyLoad = this.props.lazyLoad;
// 此处为了区分数据是不是异步渲染的，prevProps 作为标识
if (this.hasTreeNode()) {
this.setState({
prevProps: this.props
@ -34401,14 +34394,7 @@
if (this.props._getTreeObj) {
this.props._getTreeObj(this);
}
// 启用懒加载，计算树节点真实高度
if (!lazyLoad) return;
var treenodes = this.tree.querySelectorAll('.u-tree-treenode-close')[0];
if (!treenodes) return;
var rowHeight = treenodes.getBoundingClientRect().height;
this.store.setState({
rowHeight: rowHeight
});
this.calculateRowHeight();
};
// 判断初始化挂载时，有没有渲染树节点
@ -34512,6 +34498,12 @@
this.setState(st);
};
Tree.prototype.componentDidUpdate = function componentDidUpdate() {
if (!this.hasCalculateRowHeight) {
this.calculateRowHeight();
}
};
Tree.prototype.onDragStart = function onDragStart(e, treeNode) {
this.dragNode = treeNode;
this.dragNodesKeys = this.getDragNodes(treeNode);
@ -34713,6 +34705,7 @@
var rsCheckedKeys = [];
if (checked && index === -1) {
checkedKeys.push(key);
// rsCheckedKeys.push(key);//onCheck第一个参数的key不对
}
if (!checked && index > -1) {
checkedKeys.splice(index, 1);
@ -35244,7 +35237,9 @@
Tree.prototype.renderTreeNode = function renderTreeNode(child, index) {
var level = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
var pos = level + '-' + index;
// fix: 懒加载场景，index 计算错误
var actualIndex = index + parseInt(this.startIndex);
var pos = level + '-' + actualIndex;
var key = child.key || pos;
var state = this.state;
@ -35398,7 +35393,7 @@
_this6.treeNodesStates[pos] = {
siblingPosition: siblingPosition
};
});
}, undefined, startIndex);
};
if (showLine && !checkable) {
getTreeNodesStates();
@ -35431,7 +35426,7 @@
_this6.treeNodesStates[pos].checked = true;
checkedPositions.push(pos);
}
});
}, undefined, startIndex);
// if the parent node's key exists, it all children node will be checked
(0, _util.handleCheckState)(this.treeNodesStates, (0, _util.filterParentPosition)(checkedPositions), true);
checkKeys = (0, _util.getCheck)(this.treeNodesStates);
@ -35483,6 +35478,20 @@
return !noTreeNode;
};
this.calculateRowHeight = function () {
var lazyLoad = _this7.props.lazyLoad;
// 启用懒加载，计算树节点真实高度
if (!lazyLoad) return;
var treenodes = _this7.tree.querySelectorAll('.u-tree-treenode-close')[0];
if (!treenodes) return;
_this7.hasCalculateRowHeight = true;
var rowHeight = treenodes.getBoundingClientRect().height;
_this7.store.setState({
rowHeight: rowHeight
});
};
this.handleTreeListChange = function (treeList, startIndex, endIndex) {
// 属性配置设置
var attr = {
@ -35499,6 +35508,7 @@
_this7.setState({
treeData: treeData
});
_this7.dataChange = true;
};
this.deepTraversal = function (treeData) {
@ -36271,7 +36281,6 @@
exports.getNodeChildren = getNodeChildren;
exports.warnOnlyTreeNode = warnOnlyTreeNode;
exports.convertListToTree = convertListToTree;
exports.debounce = debounce;
exports.throttle = throttle;
var _react = __webpack_require__(1);
@ -36378,10 +36387,12 @@
}
function loopAllChildren(childs, callback, parent) {
var baseNum = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;
var loop = function loop(children, level, _parent) {
var len = getChildrenlength(children);
_react2['default'].Children.forEach(children, function (item, index) {
var pos = level + '-' + index;
var pos = level + '-' + (index + parseInt(baseNum));
if (item.props.children && item.type && item.type.isTreeNode) {
loop(item.props.children, pos, { node: item, pos: pos });
}
@ -36733,59 +36744,26 @@
return value != null && (type == 'object' || type == 'function');
}
/**
* 函数防抖
* @param {*} func
* @param {*} wait
* @param {*} immediate
*/
function debounce(func, wait, immediate) {
var timeout = void 0;
return function debounceFunc() {
var context = this;
var args = arguments;
// https://fb.me/react-event-pooling
if (args[0] && args[0].persist) {
args[0].persist();
}
var later = function later() {
timeout = null;
if (!immediate) {
func.apply(context, args);
}
};
var callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) {
func.apply(context, args);
}
};
}
/**
* 函数节流
* @param {*} func 延时调用函数
* @param {*} wait 延迟多长时间
* @param {*} options 至少多长时间触发一次
* @return Function 延迟执行的方法
*/
function throttle(func, wait, options) {
var leading = true;
var trailing = true;
if (typeof func !== 'function') {
throw new TypeError('Expected a function');
function throttle(fn, wait) {
var last = void 0;
return function () {
var now = Date.now();
if (!last) {
fn.apply(this, arguments);
last = now;
return;
}
if (isObject(options)) {
leading = 'leading' in options ? !!options.leading : leading;
trailing = 'trailing' in options ? !!options.trailing : trailing;
if (now - last >= wait) {
fn.apply(this, arguments);
last = now;
}
return debounce(func, wait, {
leading: leading,
trailing: trailing,
'maxWait': wait
});
};
}
/***/ }),
@ -36858,11 +36836,9 @@
_this.scrollListener = function () {
var el = _this.scrollComponent;
var parentNode = _this.getParentElement(el);
_this.scrollTop = parentNode.scrollTop;
(0, _util.throttle)(_this.handleScrollY, 500)();
_this.handleScrollY();
};
_this.handleScrollY = function () {
@ -36924,12 +36900,7 @@
_this.sliceTreeList = function (startIndex, endIndex) {
var newTreeList = []; //存储截取后的新数据
// console.log(
// "**startIndex**" + startIndex,
// "**endIndex**" + endIndex
// );
newTreeList = _this.treeList.slice(startIndex, endIndex);
// console.log(JSON.stringify(newTreeList))
_this.props.handleTreeListChange && _this.props.handleTreeListChange(newTreeList, startIndex, endIndex);
};
@ -36960,6 +36931,12 @@
}
};
// componentDidUpdate() {
// const el = this.scrollComponent;
// const parentNode = this.getParentElement(el);
// parentNode.scrollTop = this.scrollTop;
// };
InfiniteScroll.prototype.componentWillUnmount = function componentWillUnmount() {
this.detachScrollListener();
this.detachMousewheelListener();
@ -37041,11 +37018,11 @@
var scrollY = scrollEl && scrollEl.clientHeight;
var rowHeight = store.getState().rowHeight;
//默认显示20条，rowsInView根据定高算的。在非固定高下，这个只是一个大概的值。
//默认显示20条，rowsInView根据定高算的。
this.rowsInView = scrollY ? Math.floor(scrollY / rowHeight) : _config2['default'].defaultRowsInView;
scrollEl.addEventListener('scroll', this.scrollListener, this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('resize', this.scrollListener, this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('scroll', (0, _util.throttle)(this.scrollListener, 150), this.options ? this.options : this.props.useCapture);
scrollEl.addEventListener('resize', (0, _util.throttle)(this.scrollListener, 150), this.options ? this.options : this.props.useCapture);
};
/**
* 滚动事件监听
@ -37125,9 +37102,9 @@
// 树懒加载功能，需要用到的变量
exports["default"] = {
loadBuffer: 5, //懒加载时缓冲区数据量
loadBuffer: 20, //懒加载时缓冲区数据量
defaultRowsInView: 20, //可视区数据量
rowDiff: 3 //行差值，需要重新截取数据的阈值
rowDiff: 10 //行差值，需要重新截取数据的阈值
};
module.exports = exports["default"];

2
dist/demo.js.map vendored
View File

File diff suppressed because one or more lines are too long

43
src/Tree.js
View File

@ -55,11 +55,7 @@ class Tree extends React.Component {
this.store = createStore({ rowHeight: 24 }); //rowHeight 树节点的高度，此变量在滚动加载场景很关键
}
/**
* 在 lazyload 情况下，需要获取树节点的真实高度
*/
componentDidMount() {
const { lazyLoad } = this.props;
// 此处为了区分数据是不是异步渲染的，prevProps 作为标识
if(this.hasTreeNode()){
this.setState({
@ -70,14 +66,7 @@ class Tree extends React.Component {
if(this.props._getTreeObj){
this.props._getTreeObj(this);
}
// 启用懒加载，计算树节点真实高度
if(!lazyLoad) return;
const treenodes = this.tree.querySelectorAll('.u-tree-treenode-close')[0];
if(!treenodes) return;
let rowHeight = treenodes.getBoundingClientRect().height;
this.store.setState({
rowHeight: rowHeight
});
this.calculateRowHeight();
}
// 判断初始化挂载时，有没有渲染树节点
@ -176,6 +165,25 @@ class Tree extends React.Component {
this.setState(st);
}
componentDidUpdate(){
if(!this.hasCalculateRowHeight) {
this.calculateRowHeight();
}
}
calculateRowHeight = () => {
const { lazyLoad } = this.props;
// 启用懒加载，计算树节点真实高度
if(!lazyLoad) return;
const treenodes = this.tree.querySelectorAll('.u-tree-treenode-close')[0];
if(!treenodes) return;
this.hasCalculateRowHeight = true;
let rowHeight = treenodes.getBoundingClientRect().height;
this.store.setState({
rowHeight: rowHeight
});
}
onDragStart(e, treeNode) {
this.dragNode = treeNode;
this.dragNodesKeys = this.getDragNodes(treeNode);
@ -369,7 +377,7 @@ onExpand(treeNode,keyType) {
let rsCheckedKeys = [];
if (checked && index === -1) {
checkedKeys.push(key);
rsCheckedKeys.push(key);//onCheck第一个参数的key不对
// rsCheckedKeys.push(key);//onCheck第一个参数的key不对
}
if (!checked && index > -1) {
checkedKeys.splice(index, 1);
@ -890,6 +898,7 @@ onExpand(treeNode,keyType) {
this.setState({
treeData : treeData
})
this.dataChange = true;
}
/**
@ -976,7 +985,9 @@ onExpand(treeNode,keyType) {
}
renderTreeNode(child, index, level = 0) {
const pos = `${level}-${index}`;
// fix: 懒加载场景，index 计算错误
const actualIndex = index + parseInt(this.startIndex);
const pos = `${level}-${actualIndex}`;
const key = child.key || pos;
const state = this.state;
@ -1129,7 +1140,7 @@ onExpand(treeNode,keyType) {
this.treeNodesStates[pos] = {
siblingPosition,
};
});
}, undefined, startIndex);
};
if (showLine && !checkable ) {
getTreeNodesStates();
@ -1163,7 +1174,7 @@ onExpand(treeNode,keyType) {
this.treeNodesStates[pos].checked = true;
checkedPositions.push(pos);
}
});
}, undefined, startIndex);
// if the parent node's key exists, it all children node will be checked
handleCheckState(this.treeNodesStates, filterParentPosition(checkedPositions), true);
checkKeys = getCheck(this.treeNodesStates);

4
src/config.js
View File

@ -4,7 +4,7 @@
// 树懒加载功能，需要用到的变量
export default {
loadBuffer: 5, //懒加载时缓冲区数据量
loadBuffer: 20, //懒加载时缓冲区数据量
defaultRowsInView: 20, //可视区数据量
rowDiff: 3, //行差值，需要重新截取数据的阈值
rowDiff: 10, //行差值，需要重新截取数据的阈值
};

21
src/infiniteScroll.js
View File

@ -53,6 +53,12 @@ export default class InfiniteScroll extends Component {
}
}
// componentDidUpdate() {
// const el = this.scrollComponent;
// const parentNode = this.getParentElement(el);
// parentNode.scrollTop = this.scrollTop;
// };
componentWillUnmount() {
this.detachScrollListener();
this.detachMousewheelListener();
@ -152,17 +158,17 @@ export default class InfiniteScroll extends Component {
let scrollY = scrollEl && scrollEl.clientHeight;
let rowHeight = store.getState().rowHeight;
//默认显示20条，rowsInView根据定高算的。在非固定高下，这个只是一个大概的值。
//默认显示20条，rowsInView根据定高算的。
this.rowsInView = scrollY ? Math.floor(scrollY / rowHeight) : CONFIG.defaultRowsInView;
scrollEl.addEventListener(
'scroll',
this.scrollListener,
throttle(this.scrollListener, 150),
this.options ? this.options : this.props.useCapture
);
scrollEl.addEventListener(
'resize',
this.scrollListener,
throttle(this.scrollListener, 150),
this.options ? this.options : this.props.useCapture
);
}
@ -179,11 +185,9 @@ export default class InfiniteScroll extends Component {
*/
scrollListener = () => {
const el = this.scrollComponent;
const parentNode = this.getParentElement(el);
this.scrollTop = parentNode.scrollTop;
throttle(this.handleScrollY, 500)();
this.handleScrollY()
}
/**
@ -253,12 +257,7 @@ export default class InfiniteScroll extends Component {
*/
sliceTreeList = (startIndex, endIndex) => {
let newTreeList = []; //存储截取后的新数据
// console.log(
// "**startIndex**" + startIndex,
// "**endIndex**" + endIndex
// );
newTreeList = this.treeList.slice(startIndex,endIndex);
// console.log(JSON.stringify(newTreeList))
this.props.handleTreeListChange && this.props.handleTreeListChange(newTreeList, startIndex, endIndex);
}

61
src/util.js
View File

@ -94,11 +94,11 @@ function getSiblingPosition(index, len, siblingPosition) {
return siblingPosition;
}
export function loopAllChildren(childs, callback, parent) {
export function loopAllChildren(childs, callback, parent, baseNum=0) {
const loop = (children, level, _parent) => {
const len = getChildrenlength(children);
React.Children.forEach(children, (item, index) => {
const pos = `${level}-${index}`;
const pos = `${level}-${index+parseInt(baseNum)}`;
if (item.props.children && item.type && item.type.isTreeNode) {
loop(item.props.children, pos, { node: item, pos });
}
@ -414,57 +414,24 @@ function isObject(value) {
return value != null && (type == 'object' || type == 'function')
}
/**
* 函数防抖
* @param {*} func
* @param {*} wait
* @param {*} immediate
*/
export function debounce(func, wait, immediate) {
let timeout;
return function debounceFunc() {
const context = this;
const args = arguments;
// https://fb.me/react-event-pooling
if (args[0] && args[0].persist) {
args[0].persist();
}
const later = () => {
timeout = null;
if (!immediate) {
func.apply(context, args);
}
};
const callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) {
func.apply(context, args);
}
};
}
/**
* 函数节流
* @param {*} func 延时调用函数
* @param {*} wait 延迟多长时间
* @param {*} options 至少多长时间触发一次
* @return Function 延迟执行的方法
*/
export function throttle(func, wait, options) {
let leading = true
let trailing = true
if (typeof func !== 'function') {
throw new TypeError('Expected a function')
export function throttle(fn, wait){
let last;
return function() {
let now = Date.now();
if (!last) {
fn.apply(this, arguments);
last = now;
return;
}
if(now - last >= wait) {
fn.apply(this, arguments);
last = now;
}
if (isObject(options)) {
leading = 'leading' in options ? !!options.leading : leading
trailing = 'trailing' in options ? !!options.trailing : trailing
}
return debounce(func, wait, {
leading,
trailing,
'maxWait': wait,
})
}