js 常用方法
(1)startWith
- var startsWith &＃61; function (str, regex) {
- if (regex &＃61;&＃61; undefined || str &＃61;&＃61; undefined || (!str) || (!regex)) {
- return false;
- }
- return str.indexOf(regex) &＃61;&＃61; 0;
- };
测试:
- console.log(startsWith(&＃39;123abc&＃39;,&＃39;&＃39;));
(2)trim
- var trim &＃61; function (str) {
- if (typeof str &＃61;&＃61;&＃61; "object") {
- return str;
- }
- if (str &＃61;&＃61; null || str &＃61;&＃61; "" || str &＃61;&＃61; undefined) {
- return str;
- }
- if (typeof str &＃61;&＃61;&＃61; "number") {
- return str;
- }
- return str.replace(/(^\s*)|(\s*$)/g, "");
- };
应用:
- var cssColor2Hex &＃61; function (cssColor) {
- var stringObj &＃61; cssColor.replace(/RGB[\s]*\(([\w,\s]&＃43;)\)[\s]*/i, "$1");
-
- var arr &＃61; stringObj.split(&＃39;,&＃39;);
- var r &＃61; trim(arr[0]);
- var g &＃61; trim(arr[1]);
- var b &＃61; trim(arr[2]);
- var rHex &＃61; to2Hex(r);
- var gHex &＃61; to2Hex(g);
- var bHex &＃61; to2Hex(b);
- return (rHex &＃43; gHex &＃43; bHex);
- };
(3)是否包含特殊字符
-
-
-
-
-
- var containsSpecialCharacter &＃61; function (str) {
- var reg &＃61; /[&＃64;#$?*&＃xff01;&＃xff1f;]/g;
- return reg.test(str);
- };
应用:
- if (containsSpecialCharacter(orgFullName_val)) {
- setErrerMessageAndFocus($error_create_org, $orgFullName, &＃39;不能包含非法字符&＃39;);
- return;
- }
(4)动态加载js脚本文件
-
-
-
-
-
- function loadJs(url, callback) {
- var done &＃61; false;
- var script &＃61; document.createElement(&＃39;script&＃39;);
- script.type &＃61; &＃39;text/Javascript&＃39;;
- script.language &＃61; &＃39;Javascript&＃39;;
- script.charset &＃61; "utf-8";
- script.src &＃61; url;
-
- script.onload &＃61; script.onreadystatechange &＃61; function () {
- if (!done && (!script.readyState || script.readyState &＃61;&＃61; &＃39;loaded&＃39; || script.readyState &＃61;&＃61; &＃39;complete&＃39;)) {
- done &＃61; true;
- script.onload &＃61; script.onreadystatechange &＃61; null;
- if (callback) {
- callback.call(script);
- }
- }
- };
- document.getElementsByTagName("head")[0].appendChild(script);
- };
应用:
- readyCallBack&＃61;function(){
- $(document).ready(function(){
-
- clearError&＃61;function(){
- $(".errorMessage").hide(1000);
- };
- $(document).bind("keypress",clearError);
- var loginStatus &＃61; document.getElementById("loginStatus");
- if(loginStatus.value&＃61;&＃61;<%&＃61;LoginConstants.ACCOUNT_LOGINED%>){
- jAlert("",null,function(){window.location.href&＃61;&＃39;&＃39;;});
- }
- });
- loadJs(&＃39;&＃39;);
- loadJs(&＃39;&＃39;);
- };
- loadJs(&＃39;&＃39;,readyCallBack);
参考:
http://hw1287789687.iteye.com/blog/2196104
http://hw1287789687.iteye.com/blog/2196716
http://hw1287789687.iteye.com/blog/2196836
京公网安备 11010802041100号