# replace.mjs

    import isestr from './isestr.mjs'
    import isstr from './isstr.mjs'

    /**
     * 取代字串
     * 針對c查找是否含有t，並將t全部取代成r
     * 若輸入c,t,r不是字串時則回傳空字串
     *
     * Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/replace.test.mjs Github}
     * @memberOf wsemi
     * @param {String} c 輸入要被取代的字串
     * @param {String} t 輸入要查找的字串
     * @param {String} r 輸入要取代的字串
     * @returns {String} 回傳取代後字串
     * @example
     *
     * console.log(replace('1.25abc', '5a', '0'))
     * // => '1.20bc'
     *
     */
    function replace(c, t, r) {

        //check
        if (!isestr(c)) {
            return ''
        }
        if (!isestr(t)) {
            return ''
        }
        if (!isstr(r)) { //可取代成空字串
            return ''
        }

        let o = new RegExp(t, 'g')
        let rr = String(c).replace(o, r)

        return rr
    }

    export default replace