1

20220330_Vote/Ewide.Web.Entry/wwwroot/lib/xe-utils/startsWith.js

@@ -0,0 +1,16 @@
+var toValueString = require('./toValueString')
+
+/**
+  * 判断字符串是否在源字符串的头部
+  *
+  * @param {String} str 字符串
+  * @param {String/Number} val 值
+  * @param {Number} startIndex 开始索引
+  * @return {String}
+  */
+function startsWith (str, val, startIndex) {
+  var rest = toValueString(str)
+  return (arguments.length === 1 ? rest : rest.substring(startIndex)).indexOf(val) === 0
+}
+
+module.exports = startsWith