Share an interview question about closures, bind and this

This article mainly introduces you to an interview question about closure bind and this. The article gives detailed sample code. Friends in need can refer to it. Let’s take a look together.

The problem to be solved is to add a click event for each li for the following ul, and pop up the corresponding index

 
这是第一个li
 
这是第二个li
 
这是第三个li

# #Answer 1: bind, point the current anonymous function to this, and pass i as the parameter

var init = function(){
var obj = document.getElementById('text');
for(var i=0;i


Answer 2:  Closure
var init = function(){
var lis=document.querySelectorAll("#text li");
 for(var i=0;i


Solution 3:The stupidest method, matching
var init = function(){
 var obj = document.getElementById('text');
 for(var i=0;i

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