@polkadot/util-crypto/base64/trim.js

A collection of useful crypto utilities for @polkadot

/**
 * @name base64Trim
 * @description Trims padding characters
 */
export function base64Trim(value) {
    while (value.length && value[value.length - 1] === '=') {
        value = value.slice(0, -1);
    }
    return value;
}