Regex to match all characters in javascript
Question
I have a text input field in which a user can enter some text. Starting with 1 character, I want to match all elements containing that character.
Elements: (array: messages)
- Hi
- Hello
- Good
- Dog
When I enter 'H', the first 2 elements should match.
When I enter 'E', the second element should match.
When I enter 'HI', the first element should match.
And so on...
Anyway, I want to match ALL characters. When I enter a letter or a number it works, but when I enter a parenthesis, I get the following error: Invalid regular expression: unmatched parentheses
My regex:
messages.filter(e => e.match(new RegExp(filterQuery, 'i')))
1 answers
solution1
-1 2020-08-09 13:20:23
var txt ="h";
var reg = new RegExp(txt,'i');
var filterarr= arr.filter(e => reg.exec(e));
<html> <head> <title>Regex to match all characters in javascript</title> </head> <body> Array: <div id="div"></div> <br /> Filter Array: <div id="divfilter"></div> <script> var arr = ["Hi","Hello","Good","Dog"]; document.getElementById("div").innerHTML = getString(arr); var txt ="h"; var reg = new RegExp(txt,'i'); var filterarr= arr.filter(e => reg.exec(e)); document.getElementById("divfilter").innerHTML = getString(filterarr); function getString(arr){ var str=""; for(let i =0;i<arr.length;i++){ if(i,=0) str+="; "; str += arr[i]; } return str; } </script> </body> </html>
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