Drafts Directory: HTML Preview Form Example

Action

Posted by agiletortoise, Last update almost 4 years ago

Demonstrates how an HTML Preview can be used to display a form, and pass the form values back to the action for use in subsequent script steps.

For more details on this technique, see Advanced HTML Previews in the User Guide.

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Steps

htmlpreview

<!DOCTYPE html>
<html dir="auto">

<head>
  <title>[[title]]</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <style>
    @charset "utf-8";

    html {
      font-size: 100%;
      font-family: -apple-system, BlinkMacSystemFont, "helvetica neue", helvetica, roboto, noto, "segoe ui", arial, sans-serif;
       background-color: #ddd;
       color: #222;
    }

    body {
      margin: 0;
      padding: 1em;
    }

    form {
       padding: 1em;
    }
  </style>
</head>

<body>

<p>Demo action showing how JavaScript in an HTML Preview can send values back to the action for use in subsequent action steps.</p>

<form id="data-form" class="form">

<fieldset>
<legend>Form Values</legend>
<div class="pure-control-group">
    <label for="input-1">Input 1</label>
    <input id="input-1" type="text" placeholder="Input 1" value="Sample text">
</div>

<p>
	<label for="select-1">Select 1</label>
	<select id="select-1">
		<option>0</option>
		<option>1</option>
		<option>2</option>
	</select>
</p>

<p>
    <label for="checkbox-1">
    <input type="checkbox" id="checkbox-1" />&nbsp;Checkbox 1</label>
</p>

</fieldset>

<div style="margin: 1em 0 3em 0;">
<button onclick="submitFormById('data-form');return false;">
    Submit
</button>
</div>

</body>

<script>
// load form values to an object
let serialize = (form) => {
    let data = {};
    for(let e of form.elements) {
        if (e.type && e.type === 'checkbox') {
            data[e.id] = e.checked;
        }
        else {
            data[e.id] = e.value;
        }
    }
    return data;
};

// send values to Drafts action, then continue...
let submitFormById = (id) => {
	let f = document.getElementById(id);
	let data = serialize(f);
	Drafts.send("formValues", data);
	Drafts.continue();
}
</script>

</html>

script

// get the values set by HTML Preview step...
let vals = context.previewValues["formValues"];

// display them...
let s = "";
for (let k of Object.keys(vals)) {
	s += `==${k}:
${vals[k]}

`;
}

alert(s);

script

// See online documentation for examples
// https://docs.getdrafts.com/docs/actions/scripting

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