如何检查javascript变量是否包含字符串？

Question

I have a variable: $form.attr('action') that contains one of the following:

action="/Administration/Contents/JsonCreate"
action="/Administration/Contents/JsonEdit"
action="/Administration/Contents/JsonDelete"

How can I with an if () statement check to see if it contains the word "JsonEdit" ?

Answer 1

Use indexOf() :

var str = $form.attr('action');

if(str.indexOf("JsonEdit")>=0){
    //do something you want
}

Answer 2

You can use RegExp test to check if you have something there. test returns true if a match is found , and false if not.

if(/JsonEdit/.test(action)){
    //there is something
}