javascript - How to know that a string starts/ends with a specific string in jQuery?

Question

I want to know if a string starts with the specified character/string or ends with it in jQuery.

For Example:

var str = 'Hello World';

if( str starts with 'Hello' ) {
   alert('true');
} else {
   alert('false');
}

if( str ends with 'World' ) {
   alert('true');
} else {
   alert('false');
}

If there is not any function then any alternative ?

Answer 1

One option is to use regular expressions:

if (str.match("^Hello")) {
   // do this if begins with Hello
}

if (str.match("World$")) {
   // do this if ends in world
}