log(formattedDate); 4.1.2 实现toISODate方法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Date.prototype.toISODate = function() { const year = this.getFullYear(); const month = String(this.getMonth() + 1).padStart(2, '0'); const day = String(this.getDate()).padStart(2, '0...
{day: 'numeric',month: 'short',year: 'numeric',});const localTimeString = localDate.toLocaleTimeString(undefined, {hour: '2-digit',minute: '2-digit',second: '2-digit',});
newDate();newDate(value);newDate(dateString);newDate(year,monthIndex[,day[,hours[,minutes[,seconds[,milliseconds]]]); 1. 2. 3. 4. 注意, 创建一个新Date对象的唯一方法是通过 new 操作符,例如:let now = new Date(); 若将它作为常规函数调用(即不加 new 操作符),将返回一个字符串,而非 Da...
if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) { mask = date; date = undefined; } // Passing date through Date applies Date.parse, if necessary date = date ? new Date(date) : new Date; if (isNaN(date)) throw Sy...
toJSON()Returns the date as a string, formatted as a JSON date toLocaleDateString()Returns the date portion of a Date object as a string, using locale conventions toLocaleTimeString()Returns the time portion of a Date object as a string, using locale conventions ...
Date.toLocaleDateString( ) — return the date portion of a Date as a locally formatted string Availability JavaScript 1.5; JScript 5.5; ECMAScript v3 Synopsis date.toLocaleDateString( ) Returns An implementation-dependent human-readable string representation of the date portion of date, expressed in ...
// Validates that the input string is a valid date formatted as "mm/dd/yyyy" function isValidDate(dateString) { // First check for the pattern if (!/^\d{1,2}\/\d{1,2}\/\d{4}$/.test(dateString)) { return false; }
A string representation of the date and time specified by date. The date and time are represented in the local time zone and formatted using locally appropriate conventions. Usage toLocaleString() converts a date to a string, using the local time zone. This method also uses local conventions ...
if (isNaN(date)) throw SyntaxError(";invalid date";); mask = String(dF.masks[mask] || mask || dF.masks[";default";]); // Allow setting the utc argument via the mask if (mask.slice(0, 4) == ";UTC:";) { mask = mask.slice(4); ...
function stringToByte(str) { var byteArr = []; for (var i = 0; i < str.length; i++) { byteArr.push(str.charCodeAt(i)); } return byteArr; } console.log(stringToByte('AstIsGood')); // 结果 [ 65, 115, 116, 73,