setTimeout（）方法将不会执行

Question

I have written a script, but i want to limit execution time for some functions. I decided to try setTimeout() method, however it results in no time out when i execute the program, ie setTimeout() does not work.

setTimeout(rollDice(), 6000) is the line that executes instantly

Here is my code :

function rollDice() {
diceOne = Math.round(5 * Math.random() + 1);
diceTwo = Math.round(5 * Math.random() + 1);
}
function mainFunction() {
playerAI.playing = true;
playerOne.playing = true;
currentScore = 0;
playerAI.totalScore = 0;
playerOne.totalScore = 0;
while (playerAI.playing == true && playerOne.playing == true) {
    makeMove();
}
}
function makeMove() {
if (who == 0) {
    aiStrat();
    game();
}
else {
    var confirmAction = confirm("Kas soovite visata täringuid?");
    if (confirmAction) {
    decision = 1;
    }
    else {
    decision = -1;
    }
    game();
}
}
function game() {
if (decision == 1) {
    setTimeout(rollDice(), 6000); // <--- THIS GETS EXECUTED INSTANTLY
    if (diceOne != 1 && diceTwo != 1){
        currentScore += diceOne + diceTwo;
//and so on

Answer 1

The code should look like this:

setTimeout(rollDice, 6000);

By adding the parentheses, you're calling the function and setting a timer for calling whatever that function returns. You'll want to pass the function object itself.

You can't immediately use diceOne and diceTwo after setting the timeout. You have to put that code in the timeout function as well, for example:

setTimeout(function() {
    rollDice();

    if (diceOne != 1 && diceTwo != 1){
        currentScore += diceOne + diceTwo;
    ...
}, 6000);

That's because the code after setTimeout will not wait before the timeout has finished.

Answer 2

Try this:

setTimeout(function(){
    rollDice()
}, 6000) 

Answer 3

调用rollDice函数时不需要括号。

    setTimeout(rollDice, 6000);

Answer 4

I would use something like this:

setTimeout(function(){rollDice()}, 6000);