Javascript Encrypt and Decrypt Text

export class Encrpter {
    constructor(){
        this.data = new EncryptionData().encyption;
        this.encrypted_text = "";
        this.decrypted_text = "";
        this.encrypting = false;
        this.decrypting = false;
        this.illegal_characters = [34, 39, 40, 41, 42, 43, 44, 45, 46, 47, 58, 59, 60, 61, 62, 91, 92, 93, 94, 95, 96, 123, 124, 125, 126, 127];
    }
    encrypt_text(in_text){
        this.encrypting = true;
        //console.log(this.data);
        //console.log(in_text);
        //in_text = "Velkoz#1";
        this.encrypted_text = "";

        for(let i = 0; i < in_text.length; i++){
            let c = in_text[i].charCodeAt(0);
            //console.log(c);
            let random_pick = (1 + (Math.random()*4)).toFixed(0);
            //console.log(random_pick);
            this.encrypted_text = this.encrypted_text + this.data[c][random_pick];
        }
        //console.log(this.encrypted_text);
        this.encrypting = false;
    }
    decrypt_text(in_text){
        this.decrypting = true;
        //in_text = "y0fLNKCz4vKi8HUqskakf$WN&0wMvcn?R&HFX#nbN3xZagomis85njeZMjHS8ONJdm6iueWA6Xk";
        this.decrypted_text = "";

        let decrypters_chunk = [];
        let decrypters_character = [];

        //console.log(this.data);
        for(let i = 32; i < 134; i++){
            for(let j = 1; j < 6; j++){
                if(this.data[i] != undefined){
                    if(this.data[i][j] != undefined){
                        let encrypt = this.data[i][j];
                        let temp = in_text;
                        //console.log(i, encypt);
                        while(temp.indexOf(encrypt) > -1){
                            decrypters_chunk.push(encrypt);
                            decrypters_character.push(String.fromCharCode(i));
                            temp = temp.replace(encrypt,"");
                        }
                    }
                }
            }
        }
        //console.log(decrypters_chunk);
        //console.log(decrypters_character);

        while(decrypters_chunk.length > 0){
            for(let i = 0; i < decrypters_chunk.length; i++){
                let encrypt = decrypters_chunk[i];
                if(in_text.indexOf(encrypt) == 0){
                    this.decrypted_text = '' + this.decrypted_text + '' + decrypters_character[i];
                    in_text = '' + in_text.slice(encrypt.length, in_text.length + 1);
                    decrypters_chunk.splice(i,1);
                    decrypters_character.splice(i,1);
                    break;
                }
            }
        }
        //console.log(this.decrypted_text);
        this.decrypting = false;
    }
}