Where to install the old version of zotero connector for Chrome Browser, the latest version of plugin cannot download PDF files

The new version plugin report:
```
[JavaScript Error: "Error: Service worker (re)started at 2024-06-05 15:28:08
at Object.initGlobal (chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/zotero.js:182:20)"]

[JavaScript Error: "TypeError: Cannot read properties of null (reading 'children')
at scrape (bzsb.info:83:59)
at doWeb (bzsb.info:72:9)
at Zotero.Translate.Web.rest (chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/translate/translation/translate.js:1346:49)
at chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/translate/translation/translate.js:1331:39" {file: "[object Object]"}]
```

The Identical code , I can run code in the old version connector and Browser console,
but it doesn't work in the latest version connector
```
var eleId = '';
var xhr = new XMLHttpRequest();
xhr.open("POST", "searchStandard.do?action=searchPDFLanguage", false);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
eleId = JSON.parse(xhr.responseText)[0].id;
}
};
var data = "docId=" + '594122' + "&" + "originalId=" + 'da17dc0912f1a5ae65b6ed991ffa80ac' + "&" + "a100=" + 'NB/T 47014-2011'
xhr.send(data);
```
URL: https://www.bzsb.info/searchStandard.do?action=searchStandardDetail
https://s3.amazonaws.com/zotero.org/images/forums/u11764939/ebp4hsy8l8g724mecifv.png

In the new version I can't even use the "document" object in scripts, like "document.title", "document.querySelector"

I'm sure that it works before updating the latest version connector.

I just tested and located my code error, and I couldn't reply to your message in a timely manner. I'm very sorry.
I have submitted the report, ID: 2135884265.
my translator script is below:
```
{
"translatorID": "2831874d-4574-45e4-bc6e-e47048eb6857",
"label": "bzsb.info",
"creator": "yailimumu@gmail.com>",
"target": "https?://www\\.bzsb\\.info",
"minVersion": "3.0",
"maxVersion": "",
"priority": 100,
"inRepository": true,
"translatorType": 4,
"browserSupport": "gcsibv",
"lastUpdated": "2024-01-03 07:22:12"
}

function detectWeb(doc, url) {
if (url.includes('/searchStandard.do')) {
return 'standard';
}
else if (getSearchResults(doc, true)) {
return 'multiple';
}
return false;
}

function getSearchResults(doc, checkOnly) {
var items = {};
var found = false;
var rows = doc.querySelectorAll('li > a[href*="/online/"]:nth-child(2), .titleft > a[href*="/online/"]:nth-child(2)');
for (let row of rows) {
let href = row.href;
let title = ZU.trimInternal(row.textContent);
if (!href || !title) continue;
if (checkOnly) return true;
found = true;
items[href] = title;
}
return found ? items : false;
}

async function doWeb(doc, url) {
if (detectWeb(doc, url) == 'multiple') {
let items = await Zotero.selectItems(getSearchResults(doc, false));
if (!items) return;
for (let url of Object.keys(items)) {
await scrape(await requestDocument(url));
}
}
else {
await scrape(doc, url);
}
}

async function scrape(doc, url = doc.location.href) {
var newItem = new Z.Item('standard');
newItem.extra = '';
const labels = new Labels(doc, '[class="detailBox category_param_list"] > dd');
Z.debug(labels.innerData.map(arr => [arr[0], ZU.trimInternal(arr[1].innerText)]));

//let temp = '';
let temp = doc.querySelector('[class="edit_part_title"]').children[1].textContent;
//newItem.title = document.title;
try { newItem.abstractNote = doc.querySelector('[class="span8"]').children[0].children[0].children[1].children[0].innerText; } catch(error) {};
try { newItem.type = doc.querySelector('[class="detailtopBox nowbgc"]').children[2].children[0].children[1].children[1].innerText; } catch(error) {};
newItem.number = doc.querySelector('[class="edit_part_title"]').firstChild.textContent.replace(/\t|\n/g, '');
let docId = doc.querySelector('[class="edit_part_title"]').children[2].id.replace(/msgFeedback_|_a.*/g, '');
newItem.shortTitle = newItem.number.replace(/\s|\/T|\/Z|-\d{4}$/g, '');
newItem.title = newItem.number + ' ' + temp;
newItem.status = {
现行 : 'Implemented',
废弃 : "Deprecated",
未实施 : "Imposed",
调整 : "Adjusting",
部分实施 : "Part Implemented"
} [ doc.querySelector('[class="btn-success mark"]')? doc.querySelector('[class="btn-success mark"]').firstChild.nodeValue : "未实施" ];
newItem.date = labels.getWith('发布日期');
//newItem.url = url;
newItem.numPages = labels.getWith('全文页数');
newItem.language = {
中文 : 'zh-CN',
de : 'De',
en : 'En'
}[labels.getWith('全文语种')];
let lan_A300 = {
中文 : '中文',
de : '德语',
en : '英语'
}[labels.getWith('全文语种')];
newItem.libraryCatalog = '中国河北标准馆';
newItem.extra += addExtra('original-title', labels.getWith('英文名称'));
newItem.extra += addExtra('applyDate', labels.getWith('实施日期'));
newItem.extra += addExtra('ICS', labels.getWith('标准ICS号'));
newItem.extra += addExtra('CCS', labels.getWith('中标分类号'));
newItem.extra += addExtra('draftsman', labels.getWith('起草人'));
newItem.extra += addExtra('drafting-committee', labels.getWith('起草单位'));
newItem.committee = labels.getWith('起草单位');
newItem.publisher = labels.getWith("发布机构");
newItem.extra += addExtra('presenter', labels.getWith('提出单位'));
newItem.extra += addExtra('substitute-for', labels.getWith('替代以下标准'));
newItem.extra += addExtra('substitute-by', labels.getWith('被以下标准替代'));
newItem.extra += addExtra('reference', labels.getWith('引用标准'));
newItem.extra += addExtra('adopted', labels.getWith('采用标准'));
newItem.creators.push({
firstName: '',
lastName: labels.getWith('归口单位').replace(/\(.*\)$/, ''),
creatorType: 'author',
fieldMode: 1
});
var eleId = '';
var xhr = new XMLHttpRequest();
xhr.open("POST", "searchStandard.do?action=searchPDFLanguage", false);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
eleId = JSON.parse(xhr.responseText)[0].id;
}
};
var data = "docId=" + docId + "&" + "originalId=" + docId + "&" + "a100=" + newItem.number;
xhr.send(data);
if (eleId) {
var previewUrl = "https://www.bzsb.info/standardView.jsp?docId=&pageNum=14&fileName=&originalId=" + docId +
"&a100=" + newItem.number + "&A300=" + lan_A300 + "&eleId=" + eleId;
newItem.url = previewUrl;
var webgetUrl="https://www.bzsb.info/searchStandard.do?action=getPdf";
//Z.debug(pdfurl);
var Http = new XMLHttpRequest();
Http.open("GET", previewUrl);
Http.onreadystatechange = function() {
if (Http.readyState === 4 && Http.status === 200) {
// 在请求成功后的逻辑处理
var webgeturl = webgetUrl + doc.cookie;
var xhr11 = new XMLHttpRequest();
xhr11.open("GET", webgeturl, true);
xhr11.onreadystatechange = function() {
if (xhr11.readyState === 4 && xhr11.status === 200) {
// 在请求成功后的逻辑处理
}};
xhr11.send();
}
};
Http.send();
var pdfurl = "https://www.bzsb.info/searchStandard.do?action=getPdf";
newItem.attachments.push( {
title: "[Standard] Full Text PDF",
mimeType: "application/pdf",
url: pdfurl
});
};
newItem.complete();
}

class Labels {
constructor(doc, selector) {
this.innerData = [];
Array.from(doc.querySelectorAll(selector))
.filter(element => element.firstElementChild)
.filter(element => !element.querySelector(selector))
.filter(element => !/^\s*$/.test(element.textContent))
.forEach((element) => {
let elementCopy = element.cloneNode(true);
try { elementCopy.removeChild(elementCopy.querySelector('.edit_param')); } catch(error) {};
let key = elementCopy.removeChild(elementCopy.firstElementChild).innerText.replace(/\s/g, '');
//let key = elementCopy.removeChild(elementCopy.querySelector('.edit_param'));
this.innerData.push([key, elementCopy]);
});
}

getWith(label, element = false) {
if (Array.isArray(label)) {
let result = label
.map(aLabel => this.getWith(aLabel, element));
result = element
? result.find(element => element.childNodes.length)
: result.find(element => element);
return result
? result
: element
? document.createElement('div')
: '';
}
let pattern = new RegExp(label, 'i');
let keyValPair = this.innerData.find(element => pattern.test(element[0]));
if (element) return keyValPair ? keyValPair[1] : document.createElement('div');
return keyValPair
? ZU.trimInternal(keyValPair[1].innerText)
: '';
}
}

function addExtra(key, value) {
return value
? `${key}: ${value}\n`
: '';
}/** BEGIN TEST CASES **/
```

@yaolimumu: But this is totally wrong — you can't use XHR directly in a Zotero translator.

You should use the Translator Editor in Zotero to create and test your translator, and you should follow the translator documentation and other translators to write your code.

See above.

Yes, we know what XHR is. It's never been supported in Zotero translators. Look for await request in other translators for examples of how to make HTTP requests.

Because you were taking advantage of a fluke of one particular environment where translators ran and ignoring all documentation and all examples of how to make HTTP requests. You didn't write an actual Zotero translator — you wrote some invalid code that happened to run. With the MV3 update, invalid code like that will no longer work.

We're not going to spend more time on this. Again, you can look at existing translators for examples of how to do this properly.

Your code doesn't have anything to do with MV3. The point is that you need to write an actual Zotero translator, looking at our documentation and examples from official Zotero translators. You just wrote some random JavaScript and expected it to work in a translator.