英文:

include(page) function for script not loading DOM references

问题

以下是代码部分的翻译：

Using Google Apps Script HtmlService class to produce some output. This specific case is for a Google Sheets sidebar, but I'm also running into it when utilizing as a web app.

I'm running into an issue where if I put my script directly into the html file, the DOM references work fine. Once I put them into and <?!= include("page") ?> scriptlet, it throws an error;
> Uncaught TypeError: Cannot read properties of null (reading 'value')

Here is the html form and scriptlet:

First Name

Last Name

ID#

Job

Wage

Job 2

Wage 2

Job 3

Wage 3

Enter
+ Job
- Job
Close

```

This is the AddEmpJS.html referenced by the include function;

<script>
    function addRecord() {
      let fname = document.getElementById("fName").value
      let lname = document.getElementById("lName").value
      let empId = document.getElementById("empId").value
      let job = document.getElementById("job").value
      let wage = document.getElementById("wage").value
      let job2 = document.getElementById("jobtwo").value
      let wage2 = document.getElementById("wagetwo").value
      let job3 = document.getElementById("jobthree").value
      let wage3 = document.getElementById("wagethree").value
      let record = [
        fname, lname, empId, job, wage, job2, wage2, job3, wage3
      ]
      console.log(record)
      google.script.run.addEmpRecord(record);
      document.getElementById("add").reset()
    }

    function moreJobs() {
      if(document.getElementById("job2").style.display == "none") {
        document.getElementById("job2").style.display = "block"
        document.getElementById("wage2").style.display = "block"
        return "job 2 showing"
      }
      if(document.getElementById("job3").style.display == "none") {
        document.getElementById("job3").style.display = "block"
        document.getElementById("wage3").style.display = "block"
        return "job 3 showing"
      }
    }

    function lessJobs() {
      if(document.getElementById("job3").style.display == "block") {
        document.getElementById("job3").style.display = "none"
        document.getElementById("wage3").style.display = "none"
        return "removing job 3"
      }      
      if(document.getElementById("job2").style.display == "block") {
        document.getElementById("job2").style.display = "none"
        document.getElementById("wage2").style.display = "none"
        return "removing job 2"
      }
    }

    function closeSide() {
      google.script.host.close()
    }

   </script>

The include function on the server side,

function include(page) {
    return HtmlService.createHtmlOutputFromFile(page).getContent();
}

The UI that calls the sidebar,

function addEmp() {
  var page = HtmlService.createTemplateFromFile("AddEmp").evaluate();
  page.setTitle("💼 Add Employee")
  ui.showSidebar(page)

and the whole script,

const ws = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("EMPLOYEES");
const setup = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("SETUP");
const summary = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("SUMMARY");
const ui = SpreadsheetApp.getUi();

function onOpen(e) {
  ui.createMenu("👔 Employees")
    .addItem("💼 Add Employee", "addEmp")
    .addItem("✨ Edit Employee", "editEmp")
    .addItem("🔥 Del Employee", "delEmp")
    .addToUi();
  ui.createMenu("📋 Departments")
    .addItem("➕ Add Department", "addDept")
    .addItem("🔧 Edit Department", "editDept")
    .addItem("➖ Del Department", "delDept")
    .addToUi();
  ui.createMenu("⌚ Schedule")
    .addItem("📅 Add Week", "addSched")
    .addItem("🔎 Update Summary Tab", "updateTabs")
    .addToUi();    
  updateTabs();
}

function updateTabs() {
  var tabList = SpreadsheetApp.getActiveSpreadsheet().getSheets().map((s) => s.getName())
    .filter((s) => s != "SETUP" && s != "EMPLOYEES" && s != "TEMPLATE" && s != "SUMMARY")
  Logger.log(tabList)
  var rule = SpreadsheetApp.newDataValidation().requireValueInList(tabList)
  var dropDown = summary.getRange("A1").setDataValidation(rule).activate();

}

function include(page) {
    return HtmlService.createHtmlOutputFromFile(page).getContent();
}

//ADD EDIT & REMOVE EMPLOYEE HTML 
function addEmp() {
  var page = HtmlService.createTemplateFromFile("AddEmp").evaluate();
  page.setTitle("💼 Add Employee")
  ui.showSidebar(page)
}
function editEmp() {
  var page = HtmlService.createHtmlOutputFromFile("EditEmp")
    .setTitle("✨ Edit Employee");
  ui.showSidebar(page)
}
function delEmp() {
  var page = HtmlService.createHtmlOutputFromFile("DelEmp")
    .setTitle("🔥 Delete Employee");
  ui.showSidebar(page)
}

//checks for an id# and job code
// if id# already exist, err to checkId
// if job doesn't exist, eff to checkJob

function addEmpRecord(record) {
  let array

<details>
<summary>英文:</summary>

Using Google Apps Script HtmlService class to produce some output. This specific case is for a Google Sheets sidebar, but I&#39;m also running into it when utilizing as a web app.

I&#39;m running into an issue where if I put my script directly into the html file, the DOM references work fine. Once I put them into and &lt;?!= include(&quot;page&quot;) ?&gt; scriptlet, it throws an error;
&gt; Uncaught TypeError: Cannot read properties of null (reading &#39;value&#39;)

Here is the html form and scriptlet:

<body>
<?!= include('LOGO') ?>
<form id="add">
<div><input id=" fName" type="text" /> First Name</div>
<div><input id="lName" type="text" /> Last Name</div>
<div><input id="empId" type="text" /> ID#</div>
<div><input id="job" type="text" /> Job</div>
<div><input id="wage" type="text" /> Wage</div>
<div id="job2" type="text" style="display: none"><input id="jobtwo" type="text" /> Job 2</div>
<div id="wage2" type="text" style="display: none"><input id="wagetwo" type="text" /> Wage 2</div>
<div id="job3" type="text" style="display: none"><input id="jobthree" type="text" /> Job 3</div>
<div id="wage3" type="text" style="display: none"><input id="wagethree" type="text" /> Wage 3</div>
<div>
<button id="enter" type="button" onclick="addRecord()"> Enter</button>
<button id="more" type="button" onclick="moreJobs()"> + Job</button>
<button id="less" type="button" onclick="lessJobs()"> - Job</button>
<button id="close" type="button" onclick="closeSide()"> Close</button>
</div>
</form>

<?!= include("AddEmpJS") ?>
</body>

This is the AddEmpJS.html referenced by the include function;

<script>
function addRecord() {
let fname = document.getElementById("fName").value
let lname = document.getElementById("lName").value
let empId = document.getElementById("empId").value
let job = document.getElementById("job").value
let wage = document.getElementById("wage").value
let job2 = document.getElementById("jobtwo").value
let wage2 = document.getElementById("wagetwo").value
let job3 = document.getElementById("jobthree").value
let wage3 = document.getElementById("wagethree").value
let record = [
fname, lname, empId, job, wage, job2, wage2, job3, wage3
]
console.log(record)
google.script.run.addEmpRecord(record);
document.getElementById("add").reset()
}

function moreJobs() {
  if(document.getElementById("job2").style.display == "none") {
    document.getElementById("job2").style.display = "block"
    document.getElementById("wage2").style.display = "block"
    return "job 2 showing"
  }
  if(document.getElementById("job3").style.display == "none") {
    document.getElementById("job3").style.display = "block"
    document.getElementById("wage3").style.display = "block"
    return "job 3 showing"
  }
}

function lessJobs() {
  if(document.getElementById("job3").style.display == "block") {
    document.getElementById("job3").style.display = "none"
    document.getElementById("wage3").style.display = "none"
    return "removing job 3"
  }      
  if(document.getElementById("job2").style.display == "block") {
    document.getElementById("job2").style.display = "none"
    document.getElementById("wage2").style.display = "none"
    return "removing job 2"
  }
}

function closeSide() {
  google.script.host.close()
}

</script>

The include function on the server side,

`function include(page) {
    return HtmlService.createHtmlOutputFromFile(page).getContent();
}`

The UI that calls the sidebar,

function addEmp() {
var page = HtmlService.createTemplateFromFile("AddEmp").evaluate();
page.setTitle("💼 Add Employee")
ui.showSidebar(page)

and the whole script,

const ws = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("EMPLOYEES");
const setup = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("SETUP");
const summary = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("SUMMARY");
const ui = SpreadsheetApp.getUi();

function onOpen(e) {
ui.createMenu("👔 Employees")
.addItem("💼 Add Employee", "addEmp")
.addItem("✨ Edit Employee", "editEmp")
.addItem("🔥 Del Employee", "delEmp")
.addToUi();
ui.createMenu("📋 Departments")
.addItem("➕ Add Department", "addDept")
.addItem("🔧 Edit Department", "editDept")
.addItem("➖ Del Department", "delDept")
.addToUi();
ui.createMenu("⌚ Schedule")
.addItem("📅 Add Week", "addSched")
.addItem("🔎 Update Summary Tab", "updateTabs")
.addToUi();
updateTabs();
}

function updateTabs() {
var tabList = SpreadsheetApp.getActiveSpreadsheet().getSheets().map((s) => s.getName())
.filter((s) => s != "SETUP" && s != "EMPLOYEES" && s != "TEMPLATE" && s != "SUMMARY")
Logger.log(tabList)
var rule = SpreadsheetApp.newDataValidation().requireValueInList(tabList)
var dropDown = summary.getRange("A1").setDataValidation(rule).activate();

}

function include(page) {
return HtmlService.createHtmlOutputFromFile(page).getContent();
}

//ADD EDIT & REMOVE EMPLOYEE HTML
function addEmp() {
var page = HtmlService.createTemplateFromFile("AddEmp").evaluate();
page.setTitle("💼 Add Employee")
ui.showSidebar(page)
}
function editEmp() {
var page = HtmlService.createHtmlOutputFromFile("EditEmp")
.setTitle("✨ Edit Employee");
ui.showSidebar(page)
}
function delEmp() {
var page = HtmlService.createHtmlOutputFromFile("DelEmp")
.setTitle("🔥 Delete Employee");
ui.showSidebar(page)
}

//checks for an id# and job code
// if id# already exist, err to checkId
// if job doesn't exist, eff to checkJob

function addEmpRecord(record) {
let array_target = ws.getRange("C2");
let array_formula = array_target.getFormula();
array_target.clear();
if (!checkId(record[2]) && !checkJob(record[3])) {
ws.getRange(ws.getLastRow() + 1, 1, 1, 10).setValues([[
record[0], record[1], , record[2].toString(), record[3].toUpperCase(), record[4], record[5].toUpperCase(), record[6], record[7].toUpperCase(), record[8]
]])
var html = HtmlService.createHtmlOutput("<h4>Entry Accepted</h4><p>Close sidebar to continue or add another employee.</p>")
.setWidth(300)
.setHeight(125);
ui.showModalDialog(html, "Success!")

}
else if (checkId(record[2].toString())) {
var html = HtmlService.createHtmlOutput("<h4>User id# already exists</h4><p>Please choose different id#</p>")
.setWidth(200)
.setHeight(75);
ui.showModalDialog(html, "Warning!")
}
else if (checkJob(record[3])) {
var html = HtmlService.createHtmlOutput("<h4>Job Code does not exitst</h4><p>Please choose a valid job code.<br>*Case sensitive</p>")
.setWidth(200)
.setHeight(75);
ui.showModalDialog(html, "Warning!")
}
else {
var html = HtmlService.createHtmlOutput("<h4>Unspecified error</h4><p>Please contact support.</p>")
.setWidth(200)
.setHeight(75);
ui.showModalDialog(html, "Warning!")
}
array_target.setValue(array_formula)
}

// checks if an id# already exists
function checkId(num) {
var result = false;
var current_ids = ws.getRange(2, 4, ws.getLastRow(), 1).getValues();
for (id = 0; id < current_ids.length; id++) {
if (current_ids[id].toString() == num.toString()) {
result = true
}
}
return result
}

// checks if a job code exists
function checkJob(job) {
var result = false;
var current_jobs = setup.getRange(2, 3, setup.getLastRow(), 1).getValues();
for (job = 0; job < current_jobs.length; job++) {
if (current_jobs[job] == job) {
result = true
}
}
return result
}

function editEmp() {
Logger.log("editting an employee")
}

function delEmp() {
Logger.log("deleting an employee")
}

I'd like to utilize the include("page") function to keep the style, script, and html separate and readable.  What am I missing here?

I think it has something to do with how the data is loaded and evaluated, but don't see how to apply a fix.

When I split apart the code over to the scriplet include function, I looked into using a window.onload eventhandler to re-evaluate the code, but I don't know if that is the best approach with a form.

</details>


# 答案1
**得分**: 0

我相信你的目标如下。

- 你想要解决当前的问题`Uncaught TypeError: Cannot read properties of null (reading 'value')`。

当我看到你的脚本时，在HTML的顶部，使用了`&lt;div&gt;&lt;input id=&quot; fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;`。在这种情况下，`id`是`&quot; fName&quot;`。但是，在你的Javascript中，使用了`let fname = document.getElementById(&quot;fName&quot;).value`。

我认为你当前的问题`Uncaught TypeError: Cannot read properties of null (reading 'value')`的原因是这个。所以，请按照以下方式进行修改。

### 从：
	&lt;div&gt;&lt;input id=&quot; fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;

### 到：
	&lt;div&gt;&lt;input id=&quot;fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;

<details>
<summary>英文:</summary>

I believe your goal is as follows.

- You want to remove your current issue of `Uncaught TypeError: Cannot read properties of null (reading &#39;value&#39;)`.

When I saw your script, at the top HTML, `&lt;div&gt;&lt;input id=&quot; fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;` is used. In this case, `id` is `&quot; fName&quot;`. But, in your Javascript, `let fname = document.getElementById(&quot;fName&quot;).value` is used.

I think that the reason for your current issue of `Uncaught TypeError: Cannot read properties of null (reading &#39;value&#39;)` is due to this. So, please modify as follows.

### From:
	&lt;div&gt;&lt;input id=&quot; fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;

### To:
	&lt;div&gt;&lt;input id=&quot;fName&quot; type=&quot;text&quot; /&gt; First Name&lt;/div&gt;


</details>