look at the following code: function test(){ console.log(this === window); show(); window.show(); function show(){ console.log(this === window, fn ); } } function show(){ console.log(this === window, local ); } tes...
var a = 10; var obj1 = { a: 20, fn: (function() { this.a *= 2; a = 5; var a = 6; return function() { this.a *= a; console.log(a) } })() } var obj2 = { a: 30 } var fn = obj1.f...
A topic about the scope of JS functions related codes var xyx = 1; function fx(){console.log(xyx)} var xyx = 2; fx(); The result of the output is 2. isn t it supposed to look from the inside to the outside of the fx function declaration, and the...
Scope = VO + All Parent VOs I think this represents the variable object in this function scopeChain = [[VO] + [VO1] + [VO2] + [VO nesti1]]; this represents all the variable objects in the global environment All Parent VOs. ...
Why the difference between the two is wrong in the first place? it feels like a scope, but I can t tell why. Is there a specific first ? function e (v) { console.log(w) } function a(z){ return function b(y) { return function c(x) { ...
in the part where thinkphp5 is used as the site configuration item to take effect in real time read the data in the configuration table in the app_init hook function, which can be read in all pages. My idea is to use $GLOABLS. But I see other people ...
I have just learned python and encountered some problems about the scope of variables, as follows: the following is not very clear var a = 3 const f = () => { a += 4 console.log(a) } a() 7 f() 7 in js , you can not only access gl...
Code written by colleagues function tableVue(tableData){ var tableData = tableData; * vue * var tableV = new Vue({ el: -sharptable , data: { item:[] }, mounted: function () { ...
var a= 1; function fn1(){ alert(a); a = 2; } fn1(); alert(a); output 1 first, and then output 2 I would like to ask the browser about the process of performing this, and ask for advice ...
function student () { var name = xxx ; var getName = function () { return name } var setName = function (newName) { name = newName; } return { getName: getName, setName: setName, name: na...
how do you explain the relationship between spring scope and threads? Is there any relevance? the problem is as follows: spring scope is simulated in singleton mode, so it is considered that multiple requests for the same address will be executed seq...
I recently used the twilio service ( https: media.twiliocdn.com s.) and then made a successful call using js. just encountered a problem. after the end of the conversation, twilio s js sdk did not help me to turn off the key alarm on google chrome...
the component was uninstalled after calling reactDOM.unmountComponentAtNode, but an error was reported errors are as follows: I think antd is also called in this way. Project version "react-dom ": "^ 0.14.3 " ...
for example, when using a free account, only 3 debug packages can be installed on the real machine. Can the jailbreak machine fool Xcode so that it is no longer restricted? how to do it? ...
There is a span: in Vue <span>{{order.status}}< span> If there is data in the page, it will be shown here that status, adds a method that allows span to be edited (contenteditable attribute), and then changes the value on the page. After m...
<template> <div id="container"> <div style="height:1740px;"> <div id="right"> <div id="header"> <div class="border"> ...