How to implement the function of inputting only two decimal places in javascript

Method: 1. Add "oninput="value=value.toString().match(/^\d (?:\.\d{0,2})?/)" in the input tag " statement is sufficient. 2. Bind the onimput event to the input tag and use regular expressions in the processing function.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript restricts the input box to only numbers with two decimal places

##Method 1:

<input type="number" oninput="value=value.toString().match(/^\d+(?:\.\d{0,2})?/)">

Only two decimal places can be entered.

Method 2: Bind the onimput event to the input tag. In the event processing function, use regular expressions to

Implement code one:

<input type="number" id="put" >
<script type="text/javascript">
var vv = "";
document.getElementById("put").oninput=function(){
	var val = this.value.replace(/\./,"");
	var valArr=this.value.split(&#39;.&#39;);
	if((/\D/g).test(val)||valArr.length>2||valArr.length>1&&Number(valArr[1])>99){
		this.value=vv;
	}
}
</script>

Implementation code two:

<input type="number" id="put">
<script type="text/javascript">
var vv = "";
document.getElementById("put").oninput=function(){
	if(!(/^\d+(.\d{0,2})?$/).test(this.value)){
		this.value=vv;
	}
	vv.this.value;
	return false;
}
</script>

[Recommended learning:

javascript advanced tutorial]

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