<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form action="#">
<input type="checkbox" id="all">选<br/>
<input type="checkbox"><br/>
<input type="checkbox"><br/>
<input type="checkbox"><br/>
<input type="checkbox"><br/>
<input type="checkbox"><br/>
</form>
<script>
var inputs;
init()
function init(){
inputs = [].concat.apply([],document.getElementsByTagName('input'))
console.log(inputs);
for(var i=0;i<inputs.length;i++){
inputs[i].onclick = clickHandler
}
}
function clickHandler(){
if(this.id == 'all'){
for(var i=0;i<inputs.slice(1).length;i++){
inputs[i+1].checked = inputs[0].checked;
}
// inputs.slice.forEach(function(item){
// item.checked=this.checked;
// console.log('@@@',this);
// },this)
}else{
inputs[0].checked = inputs.slice(1).every(function(item){
return item.checked;
})
}
}
</script>
</body>
</html>
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