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| let lastSrcs;
const scriptReg = /\<script.*src=["'](?<src>[^"']+)/gm;
async function extractNewScripts() {
const html = await fetch('/?_timestamp=' + Date.now()).then((resp) =>
resp.text()
);
scriptReg.lastIndex = 0;
let result = [];
let match;
while ((match = scriptReg.exec(html))) {
result.push(match.groups.src);
}
return result;
}
async function needUpdate() {
const newScripts = await extractNewScripts();
if (!lastSrcs) {
lastSrcs = newScripts;
return false;
}
let result = false;
if (lastSrcs.length !== newScripts.length) {
result = true;
}
for (let i = 0; i < lastSrcs.length; i++) {
if (lastSrcs[i] !== newScripts[i]) {
result = true;
break;
}
}
lastSrcs = newScripts;
return result;
}
const DURATION = 2000;
function autoRefresh() {
setTimeout(async () => {
const willUpdate = await needUpdate();
if (willUpdate) {
const result = confirm('页面有更新，点击确定刷新页面');
if (result) {
location.reload();
}
}
autoRefresh();
}, DURATION);
}
autoRefresh();
|
