Created
January 2, 2019 21:34
-
-
Save ugate/e6ac97a38166586dcdd125ccebe75e7e to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/** | |
* Contitional directive that evaluates each template literal expression for | |
* [truthiness](https://developer.mozilla.org/en-US/docs/Glossary/Truthy). Each expression that evaluates to a _truthy_ | |
* value will include the string following the expression in the return value. Any string preceding the first expression | |
* will be included in the result. | |
* @example | |
* truthy`${ it.myValue === 123 } | |
* <div> | |
* This will be included in the result when <code>myValue === 123</code> | |
* </div> | |
* ` | |
* @param {String[]} strs The string passed into template literal tag | |
* @param {String[]} exps The expressions passed into template literal tag | |
* @returns {String} The conditional result | |
*/ | |
function truthy(strs, ...exps) { | |
var rtn = ''; | |
if (exps[0]) { | |
for (let i = 0, sln = strs.length, eln = exps.length, ln = Math.max(sln, eln); i < ln; i++) { | |
rtn += `${strs[i] ? strs[i] : ''}${exps[i] && i !== 0 ? exps[i] : ''}`; | |
} | |
} | |
return rtn; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment