How to Chop/Slice/Trim Off Last Character in String Using JavaScript

How do I chop/slice/trim off last character in string using Javascript?

You can use the substring function:

let str = "12345.00";str = str.substring(0, str.length - 1);console.log(str);

How can I remove the last character of a sentence in JavaScript?

Since the str.slice function returns the sliced part between two index as a substring, in your case, you should use str.slice(0,-1), that is equals to str.slice(0, str.length - 1). And it means that is going to return every character from zero index without the last character of the string passed.

function morseCode(str) {
    morseCode = {
    "A": ".- ",
    "B": "-... ",
    "C": "-.-. ",
    "D": "-.. ",
    "E": ". ",
    "F": "..-. ",
    "G": "--. ",
    "H": ".... ",
    "I": ".. ",
    "J": ".--- ",
    "K": "-.- ",
    "L": ".-.. ",
    "M": "-- ",
    "N": "-. ",
    "O": "--- ",
    "P": ".--. ",
    "Q": "--.- ",
    "R": ".-. ",
    "S": "... ",
    "T": "- ",
    "U": "..- ",
    "W": ".-- ",
    "X": "-..- ",
    "Y": "-.-- ",
    "Z": "--.. ",
    '1':'.---- ',
    '2':'..--- ',
    '3':'...-- ',
    '4':'....- ',
    '5':'..... ',
    '6':'-.... ',
    '7':'--... ',
    '8':'---.. ',
    '9':'----. ',}
    
    str = str.replace(/[!,?]/g , '');
    
    str = str.replace(/\s/g, '');
    
    return str.toUpperCase().split("").map(el => {
       return morseCode[el] ? morseCode[el] : el;
    }).join("").slice(0,-1);  // this returns the string without the last character.
    
};

Remove Last Character From String If It's a ! Using For-Loop - JavaScript

@T.J. Crowder pointed me in the right direction, but he didn't provide an answer that followed my original logic (in this case I wanted to use a for-loop).

The key takeaway is that s = s.replace("!", ""); will work when i-- and s = s.replace(/!+$/g, '') will work when i++. Because, as far as I understand, the replace() method only replaces the first occurrence of the string, which is why we need i-- to force the loop to iterate backwards through the string, making sure that every occurance of "!" gets replaced.

I.e. this will work:

function remove(s) {

    for (i = 0; i < s.length; i--) {

        let lastChar = s.slice(-1);

        if (lastChar === "!") {
            s = s.replace("!", '')
        }
        else {
            return s;
        }
    }
    return s;
}

And this will also work:

function remove(s) {

    for (i = 0; i < s.length; i++) {

        let lastChar = s.slice(-1);

        if (lastChar === "!") {
            s = s.replace(/!+$/g, '');
        }
        else {
            return s;
        }
    }
    return s;
}

Javascript: Remove last character if a colon

The regular expression literal (/.../) should not be in a string. Correcting your code for removing the colon at the beginning of the string, you get:

myString = myString.replace(/^\:/, '');

To match the colon at the end of the string, put $ after the colon instead of ^ before it:

myString = myString.replace(/\:$/, '');

You can also do it using plain string operations:

if (myString.charAt(myString.length - 1) == ':') {
  myString = myString.substr(0, myString.length - 1);
}

How to cut a string at the end delimited by a special character when this character is used multiple times within the same string in JavaScript?

str.slice(0, str.lastIndexOf("/"))

Given that str is hello/world/wide/peace, str.lastIndexOf("/") will find the last occurence of / in str. And then you slice the string from the beginning up to that index, and you take all that and you get hello/world/wide

var str = "hello/world/wide/peace";
console.log(str.slice(0, str.lastIndexOf("/")));

How to remove the first and the last character of a string

Here you go

var yourString = "/installers/";
var result = yourString.substring(1, yourString.length-1);

console.log(result);

remove some last characters

You could use .slice

const input = prompt('Enter something');

alert(input.slice(0, 5))

I want my delete button to remove last character in the string. Substring and slice not working as expected in javascript

numValue = numValue.substring(0, numValue.length -1);