我的代码是：

    var input = document.getElementById('showInput0');
var inputStr = 'showInput0';

numberOfInputs = 0;
function anotherInput() {
    var div = document.createElement('div');
    div.innerText = '- ';

    id = 'showInput' + numberOfInputs;
    document.body.appendChild(div).setattribute('id',id);

    /*lastNumOfId = str.slice(-1);
    lastNumOfIdMULT = lastNumOfId + 1;
    console.log('lastNumOfId:',lastNumOfId);
    var inputStr = 'showInput' + lastNumOfIdMULT;
    var input = document.getElementById(inputStr);*/
    numberOfInputs += 1;

    listen(id);
}

var help = ['help: Returns this.','clear: Clears the text'];
var numberOfOutputContainers = 0;
var numberOfOutputs = 0;

function execCommand(command) {
    inputtedCommandStr = command.toString();
    command = inputtedCommandStr.replace(/,/g,'');
    console.log('COMMAND GOT:',command);
    if (command == 'help') {
        console.log('Command',command,'registered');

        var container = document.createElement('div');
        //.setattribute('id','outputParaX');
        container.innerText = 'container:';

        idOfOutput = 'showOutput' + numberOfOutputContainers;
        document.body.appendChild(container).setattribute('id',idOfOutput);
        numberOfOutputContainers += 1;

        for (const item of help) {
            var div = document.createElement('div');
            div.innerText = item;
            id = 'Output' + help.indexOf(item);
            numberOfOutputs += 1;
            document
                .getElementById(idOfOutput)
                .appendChild(div)
                .setattribute('id',id);
        }

        anotherInput();
    } else if (command == 'clear') {
    } else {
        console.log('Command','is unknown');
    }
}

function listen(inputStr) {
    input = document.getElementById(inputStr);
    var inputtedCommandStr = '';
    var inputtedCommand = [];
    document.addEventListener('keydown',function(e) {
        //console.log(e.which);
        //console.log(e.key);

        if (e.key == 'Space') {
            inputtedCommand.push(' ');
        } else if (e.key == 'Backspace') {
            inputtedCommand.pop();
        } else if (e.key == 'Enter') {
            //EXECUTE COMMAND
            if (document.removeEventListener('keydown',e)) {
                document.removeEventListener('keydown',e);
            } else {
                console.log('NO EVENT LISTENER FOUND');
                document.removeEventListener('keydown',e);
            }
            document.removeEventListener('keydown',e);
            execCommand(
                inputtedCommand,numberOfOutputContainers,numberOfOutputs
            );
            //inputtedCommand = [];
        } else if (e.key == 'Alt') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else if (e.key == 'AltGraph') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else if (e.key == 'Shift') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else if (e.key == 'CapsLock') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else if (e.key == 'Control') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else if (e.key[0] == 'F') {
            console.log(
                'Button represents an action in the character --> not in the command string'
            );
        } else {
            inputtedCommand.push(e.key);
        }

        //console.log(inputtedCommand);
        /*
    for (const item of inputtedCommand) {
        console.log(item)

    }

    for (let index = 0; index < inputtedCommand.length; index++) {
        inputtedCommandStr[index] = inputtedCommand[index]
        console.log(inputtedCommand,inputtedCommandStr)
    }*/

        inputtedCommandStr = inputtedCommand.toString();
        input.innerHTML = '- ' + inputtedCommandStr.replace(/,'');
        console.log(input);
    });
}

anotherInput();

然后，在我输入help后，按 enter ，然后重复几次，我将其作为输出：

- help
container:
help: Returns this.
clear: Clears the text
- helphelp
container:
help: Returns this.
clear: Clears the text
- helphelp
container:
help: Returns this.
clear: Clears the text
- helphelp
container:
help: Returns this.
clear: Clears the text
- helphelp
container:
help: Returns this.
clear: Clears the text
- helphelp
container:
help: Returns this.
clear: Clears the text