Example of js RegExp Content Retrieval in text

In js, RegExp objects have three methods: test (), exec (), and compile (). They can all be used to find strings, the following is a summary of their usage.

Example 1: exec ()

1,

The Code is as follows:	Copy code
<Script type = "text/javascript"> Var hyh = new RegExp ("w "); Document.write(hyh.exe c ("Are there www. bKjia. c0m in this sentence ?")) </Script>

Output result: w

2,

The Code is as follows:	Copy code
<Script type = "text/javascript"> Var hyh = new RegExp ("e "); Document.write(hyh.exe c ("Are there E in this sentence ?")) </Script>

The output result is: null.

Example 2: test ()

1,

The Code is as follows:	Copy code
<Script type = "text/javascript"> Var hyh = new RegExp ("e "); Document. write (hyh. test ("Are there letters e in this sentence ?")); </Script>

The output result is true.

2,

The Code is as follows:	Copy code
<Script type = "text/javascript"> Var hyh = new RegExp ("e "); Document. write (hyh. test ("Are there letters E in this sentence ?")); </Script>

The output result is: false.

Example 3: compile ()

The Code is as follows:	Copy code
<Script type = "text/javascript"> Var hyh = new RegExp ("e "); Document. write (hyh. test ("there is no d in the text below, and this text contains e, haha ")); Hyh. compile ("d "); Document. write (hyh. test ("the above section contains e ")) </Script>

The output is truefalse.