String Replace in JavaScript | nodejs str replace
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TheString#replace()[1]functionreplacesinstancesofasubstringwithanothersubstring,andreturnsthemodifiedstring.Thisfunctionseemssimpleatfirst,butString#replace()candoawholelotmorethanjustreplacefoowithbar.Inthisarticle,IllexplainsomemoresophisticatedwaystouseString#replace(),andhighlightsomecommonpitfallstoavoid.TheBasicsofReplacingaStringJavaScriptstringsareimmutable[2],sotheString#replace()functionreturnsthemodifiedstring.Itdoesnotmodifytheexistingstring.conststr1=foobar;conststr2=str1.replac...
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The String#replace()[1] function replaces instances of a substring with another substring, and returns the modified string. This function seems simple at first, but String#replace() can do a whole lot more than just replace foo with bar. In this article, Ill explain some more sophisticated ways to use String#replace(), and highlight some common pitfalls to avoid.
The Basics of Replacing a StringJavaScript strings are immutable[2], so the String#replace() function returns the modified string. It does not modify the existing string.
const str1 = foo bar; const str2 = str1.replace(foo, bar); str1; str2;Generally, the first argument to replace() is called the pattern, and the 2nd argument is called the replacement. In the above example, foo is the pattern and bar is the replacement.
By default, replace() only replaces the first instance of the pattern. In the below example, JavaScript only replaces the first instance of foo with bar.
foo foo.replace(foo, ba...取得本站獨家住宿推薦 15%OFF 訂房優惠
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