Property 'replaceAll' does not exist on type 'string'
AngularTypescriptAngular10Angular Problem Overview
I want to use replaceAll
in typescript and angular 10.
But I get this error: Property 'replaceAll' does not exist on type 'string'.
This is my code:
let date="1399/06/08"
console.log(date.replaceAll('/', '_'))
Output: 13990608
How can fix my typescript to show me this function?
Angular Solutions
Solution 1 - Angular
You should be able to add those typings through your tsconfig.json
.
Add "ES2021.String"
to lib
inside compilerOptions
.
Your tsconfig should then look something like this:
{
...,
"compilerOptions": {
...,
"lib": [
...,
"ES2021.String"
]
}
}
The replaceAll
method is defined inside lib.es2021.string.d.ts
as follows:
interface String {
/**
* Replace all instances of a substring in a string, using a regular expression or search string.
* @param searchValue A string to search for.
* @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
*/
replaceAll(searchValue: string | RegExp, replaceValue: string): string;
/**
* Replace all instances of a substring in a string, using a regular expression or search string.
* @param searchValue A string to search for.
* @param replacer A function that returns the replacement text.
*/
replaceAll(searchValue: string | RegExp, replacer: (substring: string, ...args: any[]) => string): string;
}
Solution 2 - Angular
You may solve the problem using RegExp and global flag. The global flag is what makes replace
run on all occurrences.
"1399/06/08".replace(/\//g, "_") // "1399_06_08"
Solution 3 - Angular
From the docs:
> As of August 2020 the replaceAll()
method is supported by Firefox but
> not by Chrome. It will become available in Chrome 85.
Meanwhile you could find multiple other methods here.
Screenshot for possible future readers:
Solution 4 - Angular
You can create a file
> myOwnTypes.d.ts
at the root of your angular project and add the following code:
interface String {
replaceAll(input: string, output : string): any;
}
That will tell typescript that strings has this property.
Now replaceAll is supported in Chrome and Firefox but is always good to check the caniuse to check if it fits your needs.
https://caniuse.com/?search=replaceAll
If this works for you upvotes are more than welcome, Im starting with this stackoverflow account and would appreciate the support :)
Solution 5 - Angular
Just Use this function
let date="1399/06/08"
console.log(date.split('/').join('_'))
Solution 6 - Angular
Chrome supports replaceAll so it is safe to use. However typescript still issues an error, so you may cast your string to any, in order to overcome that obstacle.
const date: any ="1399/06/08"
console.log(date.replaceAll('/','_'))
Solution 7 - Angular
According to MDN Web Docs,
> "to perform a global search and replace, include the g
switch in the
> regular expression".
So, you can try doing:
const date="1399/06/08"
const forwardSlashRegex = /(\/)/g;
console.log(date.replace(forwardSlashRegex, '_'));
This automatically replaces all forward slashes with the underscore. Make sure to also keep the /g
global indicator at the end of the regex, as it allows JS to know that you want to replace ALL places where the forward slash occurs.
For more info on the use of regex indicators, refer to the following very useful guide: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions