原生js获取div的高度

var div = document.getElementById('yourDivId');
var contentHeight = div.clientHeight;

var div = document.getElementById('yourDivId');
var heightWithPadding = div.offsetHeight;

var div = document.getElementById('yourDivId');
var fullHeight = div.scrollHeight;

var div = document.getElementById('yourDivId');
var rect = div.getBoundingClientRect();
var height = rect.height; // 包括内边距、边框，但不包括外边距和滚动条

window.onload = function() {
    var div = document.getElementById('yourDivId');
    console.log(div.clientHeight);
};

// 或者使用requestAnimationFrame
function getElementHeight() {
    var div = document.getElementById('yourDivId');
    console.log(div.clientHeight);
    requestAnimationFrame(getElementHeight);
}
requestAnimationFrame(getElementHeight);