Fügen Sie den führenden Nullen zu JavaScript hinzu
const number = 5;
console.log(number.toString().padStart(2, '0')); // expected output: "05"
Smiling Skipper
const number = 5;
console.log(number.toString().padStart(2, '0')); // expected output: "05"function padLeadingZeros(num, size) {
var s = num+"";
while (s.length < size) s = "0" + s;
return s;
}
padLeadingZeros(57, 3);// "057"
padLeadingZeros(57, 4); //"0057"('0' + 11).slice(-2) // '11'
('0' + 4).slice(-2) // '04'String(<number>).padStart(<places>, '0')
String(42).padStart(5, '0'); // '00042'const str1 = '5';
console.log(str1.padStart(2, '0')); // expected output: "05"
function pad(num, size) {
num = num.toString();
while (num.length < size) num = "0" + num;
return num;
}