[英]Why match media in react does not work properly?
Hey friends help me please,各位朋友请帮帮我
I am testing a media query in JavaScript and it doesn't work properly.我正在 JavaScript 中测试媒体查询,但它不能正常工作。 The condition is met with a measure before, for example:
条件满足之前有一个度量,例如:
If it is min-with: 992px
, the condition is met when the screen exceeds the width of 893px.如果是
min-with: 992px
,则当屏幕超过 893px 的宽度时满足条件。
Why does this happen?为什么会这样? Working in vanilla JavaScript if it works perfectly.
如果它完美运行,则在香草 JavaScript 中工作。
CODE代码
const mql = window.matchMedia("(min-width: 992px)");
useEffect(() => {
mql.addEventListener("change", resize);
function resize(e) {
if (e.matches) { // If media query matches
console.log(window.screen.width);
}
}
return () => {
mql.removeEventListener("change", resize);
}
},[mql]);
CAPTURE捕获
useEffect(() => {
const mql = window.matchMedia("(min-width: 992px)");
mql.addEventListener("change", resize);
function resize(e) {
if (e.matches) { // If media query matches
console.log("more than 992");
} else {
console.log("less than 992")
}
}
return () => {
mql.removeEventListener("change", resize);
}
},[]);
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