var array = ["Zero", "One", "Two"];
var s = array + [];
console.log(s); // => Zero,One,Two

从Chrome 72开始，可以使用Intl。ListFormat:

const vehicles = ['Motorcycle', 'Bus', 'Car']; const formatter = new Intl.ListFormat('en', { style: 'long', type: 'conjunction' }); console.log(formatter.format(vehicles)); // expected output: "Motorcycle, Bus, and Car" const formatter2 = new Intl.ListFormat('de', { style: 'short', type: 'disjunction' }); console.log(formatter2.format(vehicles)); // expected output: "Motorcycle, Bus oder Car" const formatter3 = new Intl.ListFormat('en', { style: 'narrow', type: 'unit' }); console.log(formatter3.format(vehicles)); // expected output: "Motorcycle Bus Car"

请注意，这种方法还处于非常早期的阶段，所以在发布这个答案的日期，预计与旧版本的Chrome和其他浏览器不兼容。

Array.prototype.join()方法:

var arr = [" 0 "， " 1 "， " 2 "]; document . write(加勒比海盗。加入(","));

或者(更有效地):

var arr = new Array(3);
arr[0] = "Zero";
arr[1] = "One";
arr[2] = "Two";

document.write(arr); // same as document.write(arr.toString()) in this context

当调用数组的toString方法时，返回的正是您所需要的—逗号分隔的列表。

实际上，toString()实现默认使用逗号进行连接:

var arr = [ 42, 55 ];
var str1 = arr.toString(); // Gives you "42,55"
var str2 = String(arr); // Ditto

我不知道这是否是JS规范的要求，但这是几乎所有浏览器都在做的事情。

下面是将二维数组或列数组转换为正确转义的CSV字符串的实现。函数不检查有效的字符串/数字输入或列计数(确保数组从一开始就是有效的)。单元格可以包含逗号和引号!

这里有一个解码CSV字符串的脚本。

这是我编码CSV字符串的脚本:

// Example
var csv = new csvWriter();
csv.del = '\t';
csv.enc = "'";

var nullVar;
var testStr = "The comma (,) pipe (|) single quote (') double quote (\") and tab (\t) are commonly used to tabulate data in plain-text formats.";
var testArr = [
    false,
    0,
    nullVar,
    // undefinedVar,
    '',
    {key:'value'},
];

console.log(csv.escapeCol(testStr));
console.log(csv.arrayToRow(testArr));
console.log(csv.arrayToCSV([testArr, testArr, testArr]));

/**
 * Class for creating csv strings
 * Handles multiple data types
 * Objects are cast to Strings
 **/

function csvWriter(del, enc) {
    this.del = del || ','; // CSV Delimiter
    this.enc = enc || '"'; // CSV Enclosure

    // Convert Object to CSV column
    this.escapeCol = function (col) {
        if(isNaN(col)) {
            // is not boolean or numeric
            if (!col) {
                // is null or undefined
                col = '';
            } else {
                // is string or object
                col = String(col);
                if (col.length > 0) {
                    // use regex to test for del, enc, \r or \n
                    // if(new RegExp( '[' + this.del + this.enc + '\r\n]' ).test(col)) {

                    // escape inline enclosure
                    col = col.split( this.enc ).join( this.enc + this.enc );

                    // wrap with enclosure
                    col = this.enc + col + this.enc;
                }
            }
        }
        return col;
    };

    // Convert an Array of columns into an escaped CSV row
    this.arrayToRow = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.escapeCol(arr2[i]);
        }
        return arr2.join(this.del);
    };

    // Convert a two-dimensional Array into an escaped multi-row CSV 
    this.arrayToCSV = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.arrayToRow(arr2[i]);
        }
        return arr2.join("\r\n");
    };
}