在JavaScript中使用正则表达式过滤字符串中的逗号和空白

首先,删除逗号旁边的所有空格:

replace(/ *, */g, ’,’)

其次,将所有连续逗号替换为单个逗号,将所有连续空格替换为单个空格:

replace(/,+/g, ‘,’)
replace(/ +/g, ‘ ‘)

replace(/^,/, ‘’)
replace(/,$/, ‘’)

var str = " , This, is A ,,, Test , , to find regex,,in js 123 , ";
str = str.replace(/^[\s,]+|[\s,]+$|\s*(\s|,)[\s,]*/g, "$1");
console.log(str);

var str=“,This,是一个,,,Test,用于在js 123中查找regex,”;

str = str.replace(/ +/g, " "); //replace multiple space with single space
str = str.replace(/\s*,\s*/g, ","); //replace space before and after comma with single comma
str = str.replace(/,+/g, ","); //remove multiple comma with single comma
str = str.replace(/^,|,$/g, ""); //remove starting and ending comma