Question 161461 in Javascript Question posted in
A very good W3school tutorial can be found here.

“Can Javascript add value to a string if value is not 0?”

how can I add a value to a string only when the value is not 0?

e.g. value={"https://google.com?search=" + query + "&lang=" + language}

I want to add &lang= only if lang is not 0.

When language == 0, expected answer:
https://google.com?search=exampleQuery

When language is something else e.g. language == "en":
https://google.com?search=exampleQuery&lang=en

I tried using tenery operator and optional chaining but only allow to optional chain function, not string.

Tags:

4

Answers


  1. 0

    You could check the value and return oly if necessary.

    const
    addNotZero = (key, value) => value ? `&${key}=${value}` : '';
    

console.log(`https://google.com?search=x${addNotZero('lang', 0)}`);
console.log(`https://google.com?search=x${addNotZero('lang', 1)}`);
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  2. 0 
    function x(path, langCode, number){
 if(number){
  return  path+='&lang='+langCode;
 }

 return path;
}

 console.log(x('https://google.com?search=exampleQuery', 'en', 0));
console.log(x('https://google.com?search=exampleQuery', 'en', 1));
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  3. 0

    The answer you’re looking for is:

    value = { "https://google.com?search=" + query + (lang !== 0 ? "&lang="+language : null ) }

    You can add an if inline to cheek if lang is not 0.

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  4. 0

    value={("https://google.com?search=" + query + "&lang=" + language).replace('&lang=0', '')}
    let’s try this: "replace" is searching &lang=0 if succesfull just replacing with empty string
    *with just variable, I mean without curve brackets is working in my node

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