Search and replace a substring javascript

Question

I have a String something like var someString = 'Some foo email string {{Email18}} bla bla'.

I need to search and replace a substring {{Email18}} but I don't know the digit or number part. I want to something like someString.replace("{{Email*}}", "Foo") and resultant string be like 'Some foo email string Foo bla bla'.

How can I do that?

RomanPerekhrest · Accepted Answer · 2016-05-24 14:10:07Z

1

Just use \d character class if at least one digit is present at the end of substring:

var someString = 'Some foo email string {{Email18}} bla bla',
    replaced = someString.replace(/{{Email\d{1,}}}/, "Foo");

console.log(replaced);  // "Some foo email string Foo bla bla"

answered May 24, 2016 at 14:10

RomanPerekhrest

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2 Comments

Nitin Aggarwal Over a year ago

Can you also please tell me how I can get the substring like someString.search(/{{Email\d{1,}}}/) which will give me {{Email18}}?

RomanPerekhrest Over a year ago

@NitinAggarwal, use match method: var subStr = someString.match(/{{Email\d{1,}}}/); console.log(subStr[0]); // will give "{{Email18}}"

user887675 · Accepted Answer · 2016-05-24 14:07:56Z

1

You can use a regular expression match to replace:

someString.replace(/\{\{Email\d+\}\}/, "Foo")

where you escape the brackets (operators) and have an expression for 1 or more digits (\d+).

answered May 24, 2016 at 14:07

user887675

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1 Comment

Nitin Aggarwal Over a year ago

Are you sure the regex is right? It is not working in my code.

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