js怎么获取特殊符号前面的值
第一句不是固定长度的，有可能更长或者更短，但我只想要每个斜杠前面的 ，如第二句，
求！
var str = 'S0001/王费, S0002/三大能, S0003/三小叫, S0004/法尔范'
str = str.replace(/ /g, '').split(',').map(i => i.replace(/(.*)\/(.*)/, '$1')).join(',')
console.log(str) // 'S0001,S0002,S0003,S0004'
var str = 'S0001/王费, S0002/三大能, S0003/三小叫, S0004/法尔范'
str = str.replace(/ /g, '').split(',').map(i => i.replace(/(.*)\/(.*)/, '$1')).join(',')
console.log(str) // 'S0001,S0002,S0003,S0004'