Does anyone know any regex expression where I can replace a word found in a string with another string?
var replacement = "car";
var toReplace = "boat";
var str = "banana boats or boat"
str = str.replace(toReplace, replacement);
I want str to be equals to "banana boats or car" instead of "banana cars or car"
Any suggestions?
You could use a word boundary \b for replacing only the whole word, not parts of a word in a new created regular expression with the wanted word.
var replacement = "car",
toReplace = "boat",
str = "banana boats or boat";
str = str.replace(new RegExp('\\b' + toReplace + '\\b', 'g'), replacement);
console.log(str);
'g' as second parameter of the regex cosntructor.You need the global flag for multiple matches. So pass this as the replacement regex:
new RegExp(toReplace, "g")
The replace only replaces the first instance of the search string toReplace in str.
To replace all instances of toReplace in str, use a RegEx object and the g (global) flag with toReplace as the search string:
var replacement = "car";
var toReplace = "boat";
var str = "banana boats or boat";
var toReplaceRegex = new RegExp(toReplace, "g");
str = str.replace(toReplaceRegex, replacement);
console.log(str); // prints "banana cars or car"Your question is unclear because str already equals "banana boats or boat" by default before you changed it! ...but you can do this if you insist
var replacement = "car";
var toReplace = "boat";
var str = "banana boats or boat"
str = str.replace(replacement, toReplace);
stralready equals'banana boats or boat'.String-prototype.replace?str.replace(new RegExp(toReplace, "g"), replacement)