在Javascript中有没有一种通过按键调用函数的方法?
是否有一种在按键时调用函数的方法。 我的目标是制作一个可移动的块,我想知道您是否可以调用该函数来移动在Javascript中有没有一种通过按键调用函数的方法?,javascript,html,css,key,Javascript,Html,Css,Key,是否有一种在按键时调用函数的方法。 我的目标是制作一个可移动的块,我想知道您是否可以调用该函数来移动块。我也有一个问题,使人物可见,所以这将有助于帮助我 JavaScript //variables var player = document.getElementById('player'); var character = { left: player.style.left + 1, right: player.style.right + 1, top: player.style.top +
块。我也有一个问题,使人物可见,所以这将有助于帮助我
JavaScript
//variables
var player = document.getElementById('player');
var character = {
left: player.style.left + 1,
right: player.style.right + 1,
top: player.style.top + 1,
bottom: player.style.bottom + 1,
body: document.createElement('div'),
}
//functions
function running() {
console.log("Running");
console.log("Program running");
document.appendChild('div');
}
function loop() {
running();
}
function moveRight() {
character.style.position = absolute;
character.style.top = top + "px";
character.style.right = right + 2 + "px";
}
function moveLeft() {
character.style.position = absolute;
character.style.top = top + "px";
character.style.left = left + 2 + "px";
}
function moveup() {
character.style.position = absolute;
character.style.top = top + "px";
character.style.right = right + 2 + "px";
}
//functions called
loop();
HTML
角色扮演游戏
也许这可以引导你走向正确的方向。它是使用箭头键移动对象的链接
关于如何在javascript中处理密钥处理事件,有很多示例,这应该可以让您开始:
document.addEventListener('keydown', function(event) {
switch (event.keyCode) {
case 37:
//left function
break;
case 38:
//Up function
break;
case 39:
//Right function
break;
}
});
编辑:.keyCode
,。其中,.charCode
是不推荐使用的属性:
因此,您应该使用event.key
例如:
window.addEventListener("keydown", function (event) {
if (event.defaultPrevented) {
return; // Do nothing if the event was already processed
}
switch (event.key) {
case "Up": // IE/Edge specific value
case "ArrowUp":
//Up function
break;
case "Left": // IE/Edge specific
case "ArrowLeft":
//left function
break;
case "Right": // IE/Edge specific
case "ArrowRight":
//Right function
break;
default:
return; // No key event
}
event.preventDefault(); // Avoid key handling twice
}, true);
如果你在网上搜索如何做到这一点,有很多例子可以说明如何做到这一点……我试过了,但找不到太多,我得到的最好的是mobzilla
window.addEventListener("keydown", function (event) {
if (event.defaultPrevented) {
return; // Do nothing if the event was already processed
}
switch (event.key) {
case "Up": // IE/Edge specific value
case "ArrowUp":
//Up function
break;
case "Left": // IE/Edge specific
case "ArrowLeft":
//left function
break;
case "Right": // IE/Edge specific
case "ArrowRight":
//Right function
break;
default:
return; // No key event
}
event.preventDefault(); // Avoid key handling twice
}, true);