var x;
function apply() {
if (x = 1) {
alert("show");
document.getElementById("nav").style.display = "inline";
var x = 2;
} else {
alert("hide");
document.getElementById("nav").style.display = "none";
var x = 1;
}
}
function hide() {
document.getElementById("nav").style.display = "none";
x = 1;
alert(x)
}
我在处理这段代码时遇到了一些问题。我使用函数 hide
onload
并将函数 apply
链接到按钮点击。
最佳答案
正确用法:
var x; // we define the variable x global outside the functions
function apply() {
if (x == 1) { // you need to check with ==, with = you are just setting its value
alert("show")
document.getElementById("nav").style.display = "inline";
x = 2 // change the varibale to 2
} else {
alert("hide")
document.getElementById("nav").style.display = "none";
x = 1 // change it to 1
}
}
function hide() {
document.getElementById("nav").style.display = "none";
x = 1;
alert(x)
}
关于javascript - 如何在javascript if语句中定义变量,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27131878/