meTools

A collection of utility functions.

Usage

Files

You can find the precompiled versions in the dist folder.

You can find the original JavaScript files in the src folder of this package.

AMD

meLockView has AMD support. This allows it to be lazy-loaded with an AMD loader, such as RequireJS.

Node style require

meLockView has Module support:

var meTools = require('me-tools');

meTools Functions

Variable functions

Create a copy of a variable.

meTools.copyValues(vals [, deep])

• @param vals mixed
• @param deep bool; optional; deep-copy; default is true
• @returns mixed; a copy of the passed value

---

Merge 2 objects and return a copy.

meTools.mergeObjects(object1, object2)

• @param object1 Object
• @param object2 Object
• @returns {{}} New merged Object

---

Check if an object is empty.

meTools.isEmptyObject(object)

• @param object Object
• @returns {boolean}

DOM element handlers

Get a specified element.

meTools.getElementById(elementSpec)

• @param elementSpec mixed; string (id of the element) or element;
• @returns {*} element or null

---

Get the ID of an element. If the element has no ID, it will be assigned a random ID.

meTools.getId(element [, prefix])

• @param element DOM element
• @param prefix string; optional; A prefix for generated IDs; default is 'id-'
• @returns {string} ID

---

Get all ancestors of an element, possibly matching a selector, up to an optional container.

meTools.getAncestors(element [, selector] [, container] [, single])

• @param element DOM-Element;
• @param selector String; optional; selector to match the parents against
• @param container DOM-Element; optional; max parent to check; default is body
• @param single Boolean; optional; return only the next matching ancestor
• @return array

---

Check if an element is the parent of another element.

meTools.isParent(parent, child)

• @param parent DOM-element
• @param child DOM-element
• @returns {boolean}

---

Add 1 or more values to an attribute.

addAttributeValues(element, attributeName, values)

@param element DOM-element @param attributeName string @param values mixed; string or array of strings

---

Remove one or more values from an attribute.

removeAttributeValues(element, attributeName, values)

@param element DOM-element @param attributeName string @param values mixed; string or array of strings

Event handling

Add an event-listener and register it to an instance. The instance will get a property 'registeredEvents' storing the registered events.

meTools.registerEvent(scope, target, type, fn [, capture])

• @param scope object; instance to register the event to
• @param target DOM object; event target
• @param type string; event name
• @param fn function; event handler
• @param capture boolean; optional; capture the event; default is false

---

Remove (an) event-listener(s), previously registered to an instance.

meTools.unregisterEvent(scope [, target] [, type] [, fn] [, capture])

• @param scope object; instance the event was registered to
• @param target DOM object; optional; event target; if not set, matching events will be removed on all targets
• @param type string; optional; event name; if not set, all event-types will be removed
• @param fn function; optional; event handler; if not set, all event-handlers will be removed
• @param capture boolean; optional; if not set, captured & not-captured events are removed, if true only captured events are removed, if false only not-captured events are removed

---

Rate-limit the execution of a function (e.g. for events like resize and scroll). Returns a new function, that when called repetitively, executes the original function no more than once every delay milliseconds.

meTools.throttle(fn [, threshhold] [, trailing] [, scope])

• @param fn function; original function to call
• @param threshhold int; optional; delay (ms) - execute fn no more than once every delay milliseconds; default is 250
• @param trailing boolean; optional; execute fn after the calls stopped; default is true
• @param scope object; optional; instance the function should be applied to
• @returns {Function}

---

Coalesce multiple sequential calls into a single execution at either the beginning or end (e.g. for events like keydown). Returns a new function, that when called repetitively, executes the original function just once per “bunch” of calls.

meTools.debounce(fn [, pause] [, beginning] [, scope])

• @param fn function; original function to call
• @param pause int; optional; min pause (ms) between bunches of calls; default is 250
• @param beginning boolean; execute at the beginning of the call-bunch; default is false
• @param scope object; optional; instance the function should be applied to
• @returns {Function}

Package managers

You can install meTools using npm or bower.

$ npm install me-tools

or

$ bower install me-tools

License

meTools is licensed under the MIT licence.