javascript replace string
var str = "JavaScript replace method test";
var res = str.replace("test", "success");
//res = Javscript replace method success
javascript replace string
var str = "JavaScript replace method test";
var res = str.replace("test", "success");
//res = Javscript replace method success
javascript replace
const p = 'dog dog cat rat';
const regex = /dog/gi;
console.log(p.replace(regex, 'cow'));
//if pattern is regular expression all matches will be replaced
//output: "cow cow cat rat"
console.log(p.replace('dog', 'cow'));
// If pattern is a string, only the first occurrence will be replaced.
//output: "cow dog cat rat"
replace in javascript
var str = "Please locate where 'locate' occurs!";
str.replace("locate", "W3Schools"); //replace only replace first match from string
str.replace(/LOCATE/i, "W3Schools"); // i makes it case insensitive
str.replace(/LOCATE/g, "W3Schools"); // g replace all matches from string rather than replacing only first
JS replace
// siingle replace
"str".replace('s', 'a') // atr
"str".replace(/s|r/, 'a') //ata
// replace all occurrences
"strstr".replace(/s/, 'a') //atratr
// replace with a function
function replacer(match, p1, p2, p3, offset, string) {
// p1 is nondigits, p2 digits, and p3 non-alphanumerics
return [p1, p2, p3].join(' - ');
}
let newString = 'abc12345#$*%'.replace(/([^\d]*)(\d*)([^\w]*)/, replacer);
console.log(newString); // abc - 12345 - #$*%
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