jquery determines whether values ​​are equal

Jquery method to determine whether values ​​are equal: first create a code sample file; then define several different variables; finally use the comparison operator "==" or "===" to determine whether the variable values ​​​​are equal That’s it.

The operating environment of this article: windows7 system, jquery1.2.6 version, Dell G3 computer.

jquery can use == or === to judge:

1. == is to judge whether the values ​​are equal. If the data types are different, convert the data type first and then judge;

2. === is similar to ==. It also determines whether the values ​​are equal. However, if you use ===, if the data types are different and the values ​​are the same, they will not be equal.

Example:

var a = "1"; //字符串1
var b = 1; //数值1
var c = true; //布尔值1
var d = "1";
if (a==b && a==c && a==d) {console.log('equality');} //输出equality
if (a===b || a===c) { //输出not identity
console.log('identity');
}
else {
console.log('not identity');
}
if (a===d) {console.log('identity');} //输出identity

Recommended: "jquery video tutorial"

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