How to determine whether a string contains subcharacters in jquery

Jquery method to determine whether a string contains sub-characters: first create a jq folder to place jquery, and introduce jquery and the script you created in the html header; then use the [test()] method to determine whether it contains characters string.

The operating environment of this tutorial: ubuntu16 system, jquery version 1.12. This method is suitable for all brands of computers.

Related recommendations: "jQuery Video Tutorial"

jquery method to determine whether a string contains subcharacters:

1 , create a jq folder to place jquery, and two files include_test.html and include_test.js.

#2. Introduce jquery and the include_test.js script you created in the html header.

#3. First, we can use the test() method to determine whether it contains our own string.

4. You can also write new RegExp('aa') this way.

5. We can also use the indexOf() method to determine whether it contains characters. This indexOf() returns the position of the character. If not Character returns -1, as long as it is judged not to be -1, that is, >=0 exists.

#6. If you want to determine whether a certain string exists in the array, you can traverse and then use indexOf() to determine.

Related learning recommendations: javascript video tutorial

The above is the detailed content of How to determine whether a string contains subcharacters in jquery. For more information, please follow other related articles on the PHP Chinese website!