Foreign language translation--javascript tutorial--regular expression--(4)

modifier

A regular may contain a modifier that can affect search results.

There are 3 modifiers in JS:

g: Find all results;

I: result ignoring case;

m: Multi-line matching mode;

Modifier is placed after the parameter, such as:/.../g.

A regular with no global modifier returns only the first matching value:

1 alert ("123". Match (/\d/))  //  ' 1 '

If there is a global modifier, all matching values will be returned:

1 alert ("123". Match (/\d/g))  //  ' 1 ', ' 2 ', ' 3 '

multiple modifiers are also possible. For example: ignoring the global match of the case:

1 alert ("Smile a Smile". Match (/smile/gi))  //  ' Smile ', ' Smile '

A multiline match is later involved.

Foreign language translation--javascript tutorial--regular expression--(4)