Javascript how to verify if string contain ' \ ' with includes()

Question

I'm trying to to verify if a string contain this simbol \.

if (this.inputCity.includes('\')){
    // do something,,,
}

The problem is that backslash? is an escape? character... So how can I check if string contain \ ?

Thanks!

Does this answer your question? [JavaScript backslash (\‌) in variables is causing an error](https://stackoverflow.com/questions/3903488/javascript-backslash-in-variables-is-causing-an-error) — Sebastian Simon, Jan 30 '21 at 12:35

score 0 · Answer 1 · answered Jan 30 '21 at 12:35

0

You can escape the escape character by just adding another one:

if (this.inputCity.includes('\\')){
    // do something,,,
}

answered Jan 30 '21 at 12:35

Collbrothers

Thanks, there is a mode includes both of backslash? ( / and \ )? – Pietro Tamburini Jan 30 '21 at 12:40

score 0 · Accepted Answer · edited Jan 31 '21 at 12:13

0

Because it's an escape character, you have to escape it with another backslash. :)

if (this.inputCity.includes('\\')){
    // do something,,,
}

edited Jan 31 '21 at 12:13

Wai Ha Lee

answered Jan 30 '21 at 12:39

andykanu

Thanks, there is a mode includes both of backslash? ( / and \ )? – Pietro Tamburini Jan 30 '21 at 12:40
the forward slash '/' isn't a special character so you can search for that as normal. If you want both in the same statement, it would be: `if (this.inputCity.includes('\\') || this.inputCity.includes('/')) {///do something }` – andykanu Jan 30 '21 at 12:44

score 0 · Answer 3 · answered Jan 30 '21 at 12:45

0

I think you want to use the AND operator:

if(this.inputCity.includes('\\') && this.inputCity.includes('/') {
     // This will run if inputCity includes \ AND (hence the operator name) /
}

answered Jan 30 '21 at 12:45

Collbrothers

1

You should [edit](https://stackoverflow.com/posts/65968020/edit) your previous answer and update the code with this. – Zsolt Meszaros Jan 30 '21 at 13:07

3 Answers3