everyone knows that the chained call to jQuery is a wonderful use for return this, but what about Promise? For example, function start() { return new Promise((resolve, reject) => { resolve( start ); }); } start() ...
renderFooter2 (quantity) { const _self = this; console.log( showPageNumber = , _self.state.showPageNumber) let wordStyle = { color: rgba(71,129,255,1) } let numberFrameCommon = { wi...
how can I rewrite the following code into a functional language? can I use map instead of for loop? how to change it? ask God for advice const tempData = {name: value[j].name}; const tempDragData = []; for (let k = 0; k < tempArr.length; kPP) ...
"scripts": { "dev-proxy": "NODE_PORT=3000 webpack-dev-server --config webpack.dev.js --progress" } I want to run this instruction npm run dev-proxy --NODE_PORT=125000 change the port number NODE_PORT? Excuse me...
first paragraph import React from react import { connect } from react-redux import { addToCart } from .. actions cart-actions let AddTodo = ({ dispatch }) => { let input = ; return ( <div> <...
renderFooter (quantity) { const _self = this; let wordStyle = { color: rgba(71,129,255,1) } let numberFrameCommon = { width: 40, height: 40, marginLeft: 10, ...
I have tried to use both map and forEach, but I have made a mistake. Can I only use the for loop? ...
mergePromise data const timeout = ms => new Promise((resolve, reject) => { setTimeout(() => { resolve(); }, ms); }); const ajax1 = () => timeout(2000).then(() => { console.log( 1 ); return 1; }); const ajax...
if you can, please give me an example. thanks for your time! ...
let fundList = [] { name: a , id: 0, }, { name: b , id: 1, } ]; let beforeData = [ { approved_amount_sum : 44200, date : 2018-08-07 , a : 44200, a_rate : 1, }, { approved_amount_sum : null, ...
A member function in the class function queries the data and returns the result set in class DB. async Query (strSql) { await this._conpool.request() .query(strSql, (err, result) => { console.dir(result.recordset); ...
const L1items = [{ title: , L2items:[ { title: , L3items:[ , ] } ] } let temp =new Object(_.find(L1items,(item)=>{ .... })); ...
want to achieve such an effect async getInfo(id) { let params = { id } let res = await getdeviceInfo(params); return res.data } then you can pass console.log (getInfo) gets the return value directly instead of ca...
module.exports = { fetchData( dataUrl, start ) { return new Promise((resolve, reject) => { fetch(`${dataUrl} data${(start+ 0 + ).padStart(2, 0 )}.json`) .then((data) => { resolve(d...
data.map(function(value, index){ console.log( valueTitle = , value.title) if( index< 6 ) { if( value.title === null || value.title === ) { value.title = } ...
this is the configuration of webpack .babelrc babel-polyfill ie11 both chrome and ff are correct, but not under ie. It feels like the compilation of babel is wrong. Do you want to use any plug-ins? please take a look at it for your help. ...
this is the data I want to store. Is it better to store it in Cookie or LocalStorage? { code:200, msg:"", "user_id": 3, "user_type": 2 data:{ expire:7200, -sharp token:"9mzdDZXu3dENdFZQurfg0Vz8slgSgvv...
such as title: (num) => num > 0 && num % parseInt(num) === 0 num10 ...
The node = > input = node es6 arrow function is often used, and I don t know why I ended up with an assignment . render() { let input = ; return ( <div> <input ref={node => input = node} > <button t...
componentWillMount() { const _self = this; var qs = (location.search.length>0?location.search.substring(1):""); var args = {}; var items = qs.length?qs.split("&"):[]; var item = null; ...
I want to generate it automatically with mybatis generator, which is as follows in pom: <build> <plugins> <plugin> <groupId>org.mybatis.generator< groupId> <artifa...
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problem description The menu bar is located on the far right of the body. The hidden way is to display the right:0; when the right:-135px; clicks the button. close the right:-135px; to hide and close the effect. What you still want to achieve now is ...
the custom js file has a setting module.exports, which was introduced in the vue template with an error. Picture description ...
problem description use react-navigation as the route, but I need to intercept the route through whether there is a token, not to authenticate at first related codes Please paste the code text below (do not replace the code with pictures) con...