format.js
1.15 KB
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/**
* String format template
* - Inspired:
* https://github.com/Matt-Esch/string-template/index.js
*/
const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g;
export default function() {
// const { hasOwn } = Vue.util;
function hasOwn (obj, key) {
return Object.prototype.hasOwnProperty.call(obj, key);
}
/**
* template
*
* @param {String} string
* @param {Array} ...args
* @return {String}
*/
function template(string, ...args) {
if (args.length === 1 && typeof args[0] === 'object') {
args = args[0];
}
if (!args || !args.hasOwnProperty) {
args = {};
}
return string.replace(RE_NARGS, (match, prefix, i, index) => {
let result;
if (string[index - 1] === '{' &&
string[index + match.length] === '}') {
return i;
} else {
result = hasOwn(args, i) ? args[i] : null;
if (result === null || result === undefined) {
return '';
}
return result;
}
});
}
return template;
}