@zenoo/formula-js
v0.6.6
Published
Generate formulas on the fly
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FormulaJS
Generate formulas on the fly
Doc
- Installation
Simply import formula.min.js
& formula.min.css
into your HTML by downloading it or using a CDN.
<link rel="stylesheet" href="https://unpkg.com/@zenoo/[email protected]/formula.min.css">
<script src="https://unpkg.com/@zenoo/[email protected]/formula.min.js"></script>
- Demo
A demo is available on this JSFiddle
- Usage
Initialize your Formula by specifying a wrapper
and some additional options:
const formula = new Formula('#wrapper');
// OR
const formula = new Formula(wrapperElement);
// OR
const formula = new Formula(wrapperElement, options);
You can change the cursor position by clicking on an existing tag or pressing the left/right arrow keys.
- Options
The available options and their default values are:
{
separators: [' ', 'Enter'], // Characters that will process the inputted String into a new tag
closers: '+-*/()%^', // A chain of characters that will always trigger a new separate tag
lang: { // Dictionary holder (The attribute 'field' is the only one needed right now)
field: 'Custom Field'
},
customFields: undefined, // Custom Fields to display, see below
onFieldExpand: function(field){ ... } // Callback REQUIRED if you use the 'children: true' Field property. Expects a Field-like object to be returned
onUpdate: function(value){ ... } // Callback triggered whenever the Formula gets updated. It's first parameter is the String representation of the Formula
}
- Custom Fields
If you want to allow the user to pick from some predefined properties, you can use the customFields
attribute:
// Basic usage
const customFields = {
firstField: {
name: 'Pretty name'
},
whatever: {
name: 'Prettier name'
}
};
// Tree-like usage (you can deep-nest)
const customFields = {
firstField: {
name: 'Pretty name',
children: {
nestedField: {
name: 'Hey ya'
}
}
},
whatever: {
name: 'Prettier name'
}
};
// Dynamic tree-like usage
const customFields = {
firstField: {
name: 'Pretty name',
children: true, // When using a Boolean as the children value, you have to use the 'onFieldExpand' callback, see below
customData: { // This optional object will be returned as the second argument of the 'onFieldExpand' callback
whateverIWant: ':D'
}
},
whatever: {
name: 'Prettier name'
}
};
- Dynamic fields
Using children: true
as a Field property forces you to specify the onFieldExpand
callback. It will be called every time a new subtree is opened by the user.
- The first parameter of this callback returns the field Node the user opened:
<li class="formula-js-field" data-field="test" data-name="Hey">Hey<span class="children"></span></li>
The data-field
and data-name
attribute will allow you to build the subtree accordingly.
- The second parameter of this callback returns whatever you passed inside the
customData
attribute of yourField
The onFieldExpand
callback expects a Promise that resolves with a Field-like object to be returned, which will be used to build the subtree.
// Example
onFieldExpand: field => {
const
path = field.getAttribute('data-field'),
children = grabChildren(path);
return Promise.resolve(children.map(child => ({
name: prettyName(child),
children: hasChildren(child)
})));
}
- Methods
The full documentation is available on https://zenoo.github.io/FormulaJS/.
.get()
.set(formulaString)
.add(formulaString)
.addField(fieldPath)
.clear()
.destroy()
Authors
- Zenoo - Initial work - Zenoo.fr