阅读控制台错误:错误信息通常包含文件路径和行号,优先解决第一个报错,后续错误可能由第一个错误引起。聚焦核心描述如“Unexpected token”或“is not a function”。 使用Linting工具:集成ESLint与规则,自动检测语法问题。配置规则如强制标签闭合,减少人为失误。 检查导入和依赖:确认所有组件、函数和库正确导入。使
function check_num_value(obj_name,obj,minvalue,maxvalue){ var reg = /^[0-9]+$/; if(obj.value!=""&&!reg.test(obj.value)){ alert(obj_name+'只能输入数字!'); obj.value = ""; obj.focus(); return false; }else if(minvalue>obj.value||obj.value>maxvalue){ ...
6. 验证油箱格式 <SCRIPT LANGUAGE=javascript RUNAT=Server> function isEmail(strEmail) { if (strEmail.search(/^/w+((-/w+)|(/./w+))*/@[A-Za-z0-9]+((/.|-)[A-Za-z0-9]+)*/.[A-Za-z0-9]+$/) != -1) return true; else alert("oh"); } </SCRIPT> 7. 屏蔽关键字(这...
// Define the original function.var checkNumericRange = function (value) { if (typeof value !== 'number') return false; else return value >= this.minimum && value <= this.maximum;}// The range object will become the this value in the callback function.var range = { minimum: 10, ...
("userNameSpan");if(reg.test(userName)){oUserNameSpan.innerHTML="用户名格式正确".fontcolor("green");returntrue;}else{oUserNameSpan.innerHTML="用户名格式错误".fontcolor("red");returnfalse;}}functioncheckPwd(){varoUserPwdNode=document.getElementsByName("pwd")[0];varpwd=oUserPwdNode.value;...
on('show.bs.modal', function (e) { if (!data) return e.preventDefault() // stops modal from being shown }) Sanitizer Tooltips and Popovers use our built-in sanitizer to sanitize options which accept HTML. The default whiteList value is the following: Copy var ARIA_ATTRIBUTE_PATTERN = /...
{letsheets = context.workbook.worksheets; sheets.load("items/name");awaitcontext.sync();if(sheets.items.length >1) {console.log(`There are${sheets.items.length}worksheets in the workbook:`); }else{console.log(`There is one worksheet in the workbook:`); } sheets.items.forEach(function(...
Checking if String Is Primitive or ObjectA string literal is a primitive. You can check this using the custom isPrimitive() function: const foo = 'foo'; console.log(isPrimitive(foo)); // true When you use String() as a function (or wrapper around a primitive value), it coerces...
Use some function to check if the value exists in an array of objects in JavaScript.someis a great function for checking the existence of things in arrays: JavaScript check if a value exists in an array of objects Simple example code. ...
6 function func(){ 7 // 局部变量 8 var age = 18; 9 10 // 全局变量 11 gender = "男" 12 } 13 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 2)JavaScript中代码注释: 单行// 多行/* */ 注意:此注释仅在Script块中生效。 3)代码后面...