padStart() is used for head completion;
padEnd() is used for tail completion.
Examples are as follows:
var aa = "1"
aa.padStart(3,0) // 001
aa.padStart(4,'123') // 1231
aa.padEnd(3,0) // 100
aa.padEnd(6,'2') //122222
padStart() is used for head completion;
padEnd() is used for tail completion.
Examples are as follows:
var aa = "1"
aa.padStart(3,0) // 001
aa.padStart(4,'123') // 1231
aa.padEnd(3,0) // 100
aa.padEnd(6,'2') //122222