all files / string-template/ index.js

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var nargs = /\{([0-9a-zA-Z_]+)\}/g
 
module.exports = template
 
function template(string) {
    var args
 
    if (arguments.length === 2 && typeof arguments[1] === "object") {
        args = arguments[1]
    } else {
        args = new Array(arguments.length - 1)
        for (var i = 1; i < arguments.length; ++i) {
            args[i - 1] = arguments[i]
        }
    }
 
    if (!args || !args.hasOwnProperty) {
        args = {}
    }
 
    return string.replace(nargs, function replaceArg(match, i, index) {
        var result
 
        if (string[index - 1] === "{" &&
            string[index + match.length] === "}") {
            return i
        } else {
            result = args.hasOwnProperty(i) ? args[i] : null
            if (result === null || result === undefined) {
                return ""
            }
 
            return result
        }
    })
}