HTML passes parameters to js through events detailed explanation and examples

Target processingFunction is selectAttr(test)

1. Directly pass the given parameters such as:

onclick="selectAttr('1');
onclick="selectAttr('a');

2. Pass a certain attribute Value

<input type="text" id="nameId" name="typeName">
onclick="selectAttr(typeName.value);
onclick="selectAttr(nameId.value);

3. Pass this object

onclick="selectAttr(this);

Get the corresponding option value through this object: this.value or this.name;

If yes Custom attributes can be obtained in the following ways:

document:

var divs=document.getElementById("typeName1");
 var x=divs.getAttribute("code");

code is a custom attribute.

jqery method to obtain:

$("#typeName").attr("value"); 
var typeName=$("#sel").find("option:selected").attr("code");

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