8000 Add tag function for template literals by zazula · Pull Request #229 · alexei/sprintf.js · GitHub
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Add tag function for template literals #229

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78bfd0b
add tag function for template literals
zazula Dec 21, 2023
f67e08b
cleanup
zazula Dec 21, 2023
09e490e
cleanup, added tests
zazula Dec 21, 2023
f52da13
Update sprintf.js
zazula Dec 22, 2023
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add tag function for template literals
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@zazula
zazula committed Dec 21, 2023
commit 78bfd0be50ccc168f8f76b0328f17a999785d2ba
41 changes: 39 additions & 2 deletions src/sprintf.js
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Original file line number Diff line number Diff line change
Expand Up @@ -206,26 +206,63 @@
return sprintf_cache[fmt] = parse_tree
}

// tagged template string version
// original function reference, adapted to use sprintf
// https://ghost-together.medium.com/tagged-template-literals-1e1f175c21e4
function SPF(strings, ...values) {
// stolen from sprintf
const re = /^\x25(?:([1-9]\d*)\$|\(([^)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-gijostTuvxX])/
let result = ``;


strings.map((string, index) => {
var match

let value = (index <= values.length - 1) ? values[index] : ``;

// look ahead for a format for the current value
match = re.exec(strings[index+1])

if ( match ) {
value = sprintf(match[0], value)
}

// clean up format on current string
// (was used to format previous value)
match = re.exec(string)

if ( match ) {
string = string.slice(match[0].length)
}

result += 87AE string + value;
});
return result;
}

/**
* export to either browser or node.js
*/
/* eslint-disable quote-props */
if (typeof exports !== 'undefined') {
exports['sprintf'] = sprintf
exports['vsprintf'] = vsprintf
exports['SPF'] = SPF
}
if (typeof window !== 'undefined') {
window['sprintf'] = sprintf
window['vsprintf'] = vsprintf

window['SPF'] = SPF
if (typeof define === 'function' && define['amd']) {
define(function() {
return {
'sprintf': sprintf,
'vsprintf': vsprintf
'vsprintf': vsprintf,
'SPF': SPF
}
})
}
}

/* eslint-enable quote-props */
}(); // eslint-disable-line
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