---
title: "Forms V1: Form Builder & Custom Scripts (Legacy)"
description: Legacy Forms V1 reference of custom JavaScript snippets for hiding/disabling fields, conditional logic, redirects, and certification upload actions.
---
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# Forms V1: Form Builder & Custom Scripts (Legacy)
## Custom script and form action snippets for maintaining legacy Forms V1 builds
> **What this is:** Reference snippets for **Forms V1** (legacy) custom scripts and actions. **Use when:** You are maintaining an existing Forms V1 form that relies on custom scripts.
> ⚠️ Forms V1 is legacy. If you are building something new, confirm whether it should be built in Forms V2 instead.
---
## Snippets (Custom Scripts)
### Set a Text Input control as read-only
Add a `Custom Script` object and use:
```
// disable 'badge' field
const field = document.querySelector("input[name='badge']");
if (field) {
field.readOnly = true;
}
```
Update the selector to match the control you want to modify. In this example, the field name is `badge`.
### Set the value of a Text Input control
```
field.value = "Your Text Here";
```
### Hide a Text Input control
```
if (field.parentNode && field.parentNode.parentNode) {
field.parentNode.parentNode.style.display = "none";
}
```
### Conditional choices (more complex example)
```
// disable 'Journeyman' hidden field
const journeyman = document.querySelector("input[name='Journeyman']");
if (journeyman) {
journeyman.readOnly = true;
journeyman.value = "";
if (journeyman.parentNode && journeyman.parentNode.parentNode) {
journeyman.parentNode.parentNode.style.display = "none";
}
}
let radiosApp = document.getElementsByName('Apprentice');
for (var i = 0, length = radiosApp.length; i < length; i++) {
radiosApp[i].addEventListener('change', function() {
if (this.value == 'Yes') {
let radiosTrain = document.getElementsByName('Trainee');
for (var i = 0, length = radiosTrain.length; i < length; i++) {
if (radiosTrain[i].value == 'no') {
radiosTrain[i].checked = true;
}
}
}
})
}
let radiosTrain = document.getElementsByName('Trainee');
for (var i = 0, length = radiosTrain.length; i < length; i++) {
radiosTrain[i].addEventListener('change', function() {
if (this.value == 'Yes') {
let radiosApp = document.getElementsByName('Apprentice');
for (var i = 0, length = radiosApp.length; i < length; i++) {
if (radiosApp[i].value == 'no') {
radiosApp[i].checked = true;
}
}
}
})
}
function submitted(event) {
let isApprentice = true;
let radios = document.getElementsByName('Apprentice');
for (var i = 0, length = radios.length; i < length; i++) {
if (radios[i].checked && radios[i].value == 'no') {
radios[i].value = '';
isApprentice = false;
// only one radio can be logically checked, don't check the rest
break;
}
}
let isTrainee = true;
radios = document.getElementsByName('Trainee');
for (var i = 0, length = radios.length; i < length; i++) {
if (radios[i].checked && radios[i].value == 'no') {
radios[i].value = '';
isTrainee = false;
// only one radio can be logically checked, don't check the rest
break;
}
}
if (!isApprentice && !isTrainee) {
journeyman.value = "Yes";
}
}
var form = document.forms[0];
form.addEventListener("submit", submitted, false);
```
---
## Randomly select a number of fields to keep and hide the rest
Looks for labels that start with a number like `1.` , `2.` , etc.
- Randomly keeps 10 of them and hides the rest
- Renumbers visible labels sequentially
```
const numToKeep = 10;
let parent = document;
let toRemove = Array.from(parent.querySelectorAll('label'))
.filter(l => l.textContent.match(/[0-9]+\. /))
.map(l => { return { parent: l.parentElement.parentElement, el: l } });
let toKeep = [];
for (let i = 0; i < numToKeep; i++) {
const pick = Math.floor(Math.random() * toRemove.length);
toKeep.push(...toRemove.splice(pick, 1));
}
toRemove.forEach(e => { e.parent.style.display = 'none' });
Array.from(parent.querySelectorAll('label'))
.filter(l => l.offsetParent && l.textContent.match(/[0-9]+\. /))
.forEach((e, i) => {
e.innerHTML = e.innerHTML.replace(/[0-9]+\. /, `${i + 1}. `);
```
---
## Redirect using a dropdown
```
function redirect() {
let field = document.querySelector("input[name='language']");
if (field) {
let url = field.value;
if (url) {
window.location.href = url;
}
}
}
var form = document.forms[0];
const submitButton = form.querySelector('button[type="submit"], input[type="submit"]');
submitButton.addEventListener('click', function(event) {
// Prevent the default form submission behavior
event.preventDefault();
redirect();
});
```
---
## Set value of a field and hide it
```
// set 'resourceType' field to 'SITE_EQUIPMENT' and hide it
let field = document.querySelector("input[name='resourceType']");
if (field) {
field.readOnly = true;
field.value = "SITE_EQUIPMENT";
if (field.parentNode && field.parentNode.parentNode) {
field.parentNode.parentNode.style.display = "none";
}
}
```
---
## Custom Form Actions
### Register visitors with timed access
```
{ "workforce": {"name": "registration", "options": { "visitor": true, "accessDuration": 60 } } }
```
### 2-step certification upload actions
Standard for the looping yes/no form to add multiple certifications:
```
{"response": {"name":"add", "options": { "key": "certifications", "type": "array", "attachments": "ids"}},"redirect":"https://us.sitemetric.com/forms/H04AUZ5GQR?r=parentId&more=true"}
```
To skip the yes/no loop, redirect to form using `?p=responseId` and set the following action:
```
{"workforce": {"name":"certification"}}
```
### Manage Worker Labels custom action
```
{"setWorkerLabels": { } }
```
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