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js Gets the last few characters of a string

intercept string

Why do you want to cut strings?

Because sometimes, we need to determine whether a string contains a particular character or not.

substring(a) starts at the beginning (including a) and ends at the end of the string (truncating the last 6 strings)

Truncate the character at the end of a string, which can be used to determine whether it ends with XXX. and judge by the ending.

var str = 'ilike';

console.log(str.substring(str.length - 4)); // like

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