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Other References

CSSStyleDeclaration JS Conversion


JavaScript RegExp test()


文字列で文字「e」を検索します。

let text = "The best things in life are free"; let pattern = /e/;
let result = pattern.test(text);

定義と使用法

test()メソッドは、文字列の一致をテストします。

一致するものが見つかった場合はtrueを返し、そうでない場合はfalseを返します。

ブラウザのサポート

test()ECMAScript1(ES1)機能です。

ES1(JavaScript 1997)は、すべてのブラウザーで完全にサポートされています。

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes


構文

RegExpObject.test(string)

パラメータ値

Parameter Description
string Required. The string to be searched

戻り値

Type Description
Boolean Returns true if it finds a match, otherwise false


その他の例

グローバル検索を実行し、文字列内の「Hello」と「W3Schools」をテストします。

// The string:
let text = "Hello world!";

// Look for "Hello"
let pattern1 = /Hello/g;
let result1 = patt.test(text);

// Look for "W3Schools"
let pattern2 = /W3Schools/g;
let result2 = pattern2.test(text);

正規表現の検索方法

JavaScriptでは、正規表現のテキスト検索をさまざまな方法で実行できます。

正規表現としてのパターンの場合、これらは最も一般的な方法です。

説明
text.match(パターンStringメソッドmatch()
text.search(パターン文字列メソッドsearch()
パターン.exec(テキスト)RexExpメソッドexec()
パターン.test(テキスト)RegExpメソッドtest()