476 lines
17 KiB
JavaScript
476 lines
17 KiB
JavaScript
(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
|
|
"use strict";
|
|
|
|
/* eslint-disable */
|
|
|
|
/*!
|
|
* The MIT License
|
|
*
|
|
* Copyright (c) 2012 James Allardice
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
(function (global) {
|
|
'use strict'; //
|
|
// Test for support. We do this as early as possible to optimise for browsers
|
|
// that have native support for the attribute.
|
|
//
|
|
|
|
var test = document.createElement('input');
|
|
var nativeSupport = test.placeholder !== void 0;
|
|
global.Placeholders = {
|
|
nativeSupport: nativeSupport,
|
|
disable: nativeSupport ? noop : disablePlaceholders,
|
|
enable: nativeSupport ? noop : enablePlaceholders
|
|
};
|
|
|
|
if (nativeSupport) {
|
|
return;
|
|
} //
|
|
// If we reach this point then the browser does not have native support for
|
|
// the attribute.
|
|
//
|
|
// The list of input element types that support the placeholder attribute.
|
|
|
|
|
|
var validTypes = ['text', 'search', 'url', 'tel', 'email', 'password', 'number', 'textarea']; // The list of keycodes that are not allowed when the polyfill is configured
|
|
// to hide-on-input.
|
|
|
|
var badKeys = [// The following keys all cause the caret to jump to the end of the input
|
|
// value.
|
|
27, // Escape
|
|
33, // Page up
|
|
34, // Page down
|
|
35, // End
|
|
36, // Home
|
|
// Arrow keys allow you to move the caret manually, which should be
|
|
// prevented when the placeholder is visible.
|
|
37, // Left
|
|
38, // Up
|
|
39, // Right
|
|
40, // Down
|
|
// The following keys allow you to modify the placeholder text by removing
|
|
// characters, which should be prevented when the placeholder is visible.
|
|
8, // Backspace
|
|
46 // Delete
|
|
]; // Styling variables.
|
|
|
|
var placeholderStyleColor = '#ccc';
|
|
var placeholderClassName = 'placeholdersjs';
|
|
var classNameRegExp = new RegExp('(?:^|\\s)' + placeholderClassName + '(?!\\S)'); // The various data-* attributes used by the polyfill.
|
|
|
|
var ATTR_CURRENT_VAL = 'data-placeholder-value';
|
|
var ATTR_ACTIVE = 'data-placeholder-active';
|
|
var ATTR_INPUT_TYPE = 'data-placeholder-type';
|
|
var ATTR_FORM_HANDLED = 'data-placeholder-submit';
|
|
var ATTR_EVENTS_BOUND = 'data-placeholder-bound';
|
|
var ATTR_OPTION_FOCUS = 'data-placeholder-focus';
|
|
var ATTR_OPTION_LIVE = 'data-placeholder-live';
|
|
var ATTR_MAXLENGTH = 'data-placeholder-maxlength'; // Various other variables used throughout the rest of the script.
|
|
|
|
var UPDATE_INTERVAL = 100;
|
|
var head = document.getElementsByTagName('head')[0];
|
|
var root = document.documentElement;
|
|
var Placeholders = global.Placeholders;
|
|
var keydownVal; // Get references to all the input and textarea elements currently in the DOM
|
|
// (live NodeList objects to we only need to do this once).
|
|
|
|
var inputs = document.getElementsByTagName('input');
|
|
var textareas = document.getElementsByTagName('textarea'); // Get any settings declared as data-* attributes on the root element.
|
|
// Currently the only options are whether to hide the placeholder on focus
|
|
// or input and whether to auto-update.
|
|
|
|
var hideOnInput = root.getAttribute(ATTR_OPTION_FOCUS) === 'false';
|
|
var liveUpdates = root.getAttribute(ATTR_OPTION_LIVE) !== 'false'; // Create style element for placeholder styles (instead of directly setting
|
|
// style properties on elements - allows for better flexibility alongside
|
|
// user-defined styles).
|
|
|
|
var styleElem = document.createElement('style');
|
|
styleElem.type = 'text/css'; // Create style rules as text node.
|
|
|
|
var styleRules = document.createTextNode('.' + placeholderClassName + ' {' + 'color:' + placeholderStyleColor + ';' + '}'); // Append style rules to newly created stylesheet.
|
|
|
|
if (styleElem.styleSheet) {
|
|
styleElem.styleSheet.cssText = styleRules.nodeValue;
|
|
} else {
|
|
styleElem.appendChild(styleRules);
|
|
} // Prepend new style element to the head (before any existing stylesheets,
|
|
// so user-defined rules take precedence).
|
|
|
|
|
|
head.insertBefore(styleElem, head.firstChild); // Set up the placeholders.
|
|
|
|
var placeholder;
|
|
var elem;
|
|
|
|
for (var i = 0, len = inputs.length + textareas.length; i < len; i++) {
|
|
// Find the next element. If we've already done all the inputs we move on
|
|
// to the textareas.
|
|
elem = i < inputs.length ? inputs[i] : textareas[i - inputs.length]; // Get the value of the placeholder attribute, if any. IE10 emulating IE7
|
|
// fails with getAttribute, hence the use of the attributes node.
|
|
|
|
placeholder = elem.attributes.placeholder; // If the element has a placeholder attribute we need to modify it.
|
|
|
|
if (placeholder) {
|
|
// IE returns an empty object instead of undefined if the attribute is
|
|
// not present.
|
|
placeholder = placeholder.nodeValue; // Only apply the polyfill if this element is of a type that supports
|
|
// placeholders and has a placeholder attribute with a non-empty value.
|
|
|
|
if (placeholder && inArray(validTypes, elem.type)) {
|
|
newElement(elem);
|
|
}
|
|
}
|
|
} // If enabled, the polyfill will repeatedly check for changed/added elements
|
|
// and apply to those as well.
|
|
|
|
|
|
var timer = setInterval(function () {
|
|
for (var i = 0, len = inputs.length + textareas.length; i < len; i++) {
|
|
elem = i < inputs.length ? inputs[i] : textareas[i - inputs.length]; // Only apply the polyfill if this element is of a type that supports
|
|
// placeholders, and has a placeholder attribute with a non-empty value.
|
|
|
|
placeholder = elem.attributes.placeholder;
|
|
|
|
if (placeholder) {
|
|
placeholder = placeholder.nodeValue;
|
|
|
|
if (placeholder && inArray(validTypes, elem.type)) {
|
|
// If the element hasn't had event handlers bound to it then add
|
|
// them.
|
|
if (!elem.getAttribute(ATTR_EVENTS_BOUND)) {
|
|
newElement(elem);
|
|
} // If the placeholder value has changed or not been initialised yet
|
|
// we need to update the display.
|
|
|
|
|
|
if (placeholder !== elem.getAttribute(ATTR_CURRENT_VAL) || elem.type === 'password' && !elem.getAttribute(ATTR_INPUT_TYPE)) {
|
|
// Attempt to change the type of password inputs (fails in IE < 9).
|
|
if (elem.type === 'password' && !elem.getAttribute(ATTR_INPUT_TYPE) && changeType(elem, 'text')) {
|
|
elem.setAttribute(ATTR_INPUT_TYPE, 'password');
|
|
} // If the placeholder value has changed and the placeholder is
|
|
// currently on display we need to change it.
|
|
|
|
|
|
if (elem.value === elem.getAttribute(ATTR_CURRENT_VAL)) {
|
|
elem.value = placeholder;
|
|
} // Keep a reference to the current placeholder value in case it
|
|
// changes via another script.
|
|
|
|
|
|
elem.setAttribute(ATTR_CURRENT_VAL, placeholder);
|
|
}
|
|
}
|
|
} else if (elem.getAttribute(ATTR_ACTIVE)) {
|
|
hidePlaceholder(elem);
|
|
elem.removeAttribute(ATTR_CURRENT_VAL);
|
|
}
|
|
} // If live updates are not enabled cancel the timer.
|
|
|
|
|
|
if (!liveUpdates) {
|
|
clearInterval(timer);
|
|
}
|
|
}, UPDATE_INTERVAL); // Disabling placeholders before unloading the page prevents flash of
|
|
// unstyled placeholders on load if the page was refreshed.
|
|
|
|
addEventListener(global, 'beforeunload', function () {
|
|
Placeholders.disable();
|
|
}); //
|
|
// Utility functions
|
|
//
|
|
// No-op (used in place of public methods when native support is detected).
|
|
|
|
function noop() {} // Avoid IE9 activeElement of death when an iframe is used.
|
|
//
|
|
// More info:
|
|
// - http://bugs.jquery.com/ticket/13393
|
|
// - https://github.com/jquery/jquery/commit/85fc5878b3c6af73f42d61eedf73013e7faae408
|
|
|
|
|
|
function safeActiveElement() {
|
|
try {
|
|
return document.activeElement;
|
|
} catch (err) {}
|
|
} // Check whether an item is in an array. We don't use Array.prototype.indexOf
|
|
// so we don't clobber any existing polyfills. This is a really simple
|
|
// alternative.
|
|
|
|
|
|
function inArray(arr, item) {
|
|
for (var i = 0, len = arr.length; i < len; i++) {
|
|
if (arr[i] === item) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
} // Cross-browser DOM event binding
|
|
|
|
|
|
function addEventListener(elem, event, fn) {
|
|
if (elem.addEventListener) {
|
|
return elem.addEventListener(event, fn, false);
|
|
}
|
|
|
|
if (elem.attachEvent) {
|
|
return elem.attachEvent('on' + event, fn);
|
|
}
|
|
} // Move the caret to the index position specified. Assumes that the element
|
|
// has focus.
|
|
|
|
|
|
function moveCaret(elem, index) {
|
|
var range;
|
|
|
|
if (elem.createTextRange) {
|
|
range = elem.createTextRange();
|
|
range.move('character', index);
|
|
range.select();
|
|
} else if (elem.selectionStart) {
|
|
elem.focus();
|
|
elem.setSelectionRange(index, index);
|
|
}
|
|
} // Attempt to change the type property of an input element.
|
|
|
|
|
|
function changeType(elem, type) {
|
|
try {
|
|
elem.type = type;
|
|
return true;
|
|
} catch (e) {
|
|
// You can't change input type in IE8 and below.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function handleElem(node, callback) {
|
|
// Check if the passed in node is an input/textarea (in which case it can't
|
|
// have any affected descendants).
|
|
if (node && node.getAttribute(ATTR_CURRENT_VAL)) {
|
|
callback(node);
|
|
} else {
|
|
// If an element was passed in, get all affected descendants. Otherwise,
|
|
// get all affected elements in document.
|
|
var handleInputs = node ? node.getElementsByTagName('input') : inputs;
|
|
var handleTextareas = node ? node.getElementsByTagName('textarea') : textareas;
|
|
var handleInputsLength = handleInputs ? handleInputs.length : 0;
|
|
var handleTextareasLength = handleTextareas ? handleTextareas.length : 0; // Run the callback for each element.
|
|
|
|
var len = handleInputsLength + handleTextareasLength;
|
|
var elem;
|
|
|
|
for (var i = 0; i < len; i++) {
|
|
elem = i < handleInputsLength ? handleInputs[i] : handleTextareas[i - handleInputsLength];
|
|
callback(elem);
|
|
}
|
|
}
|
|
} // Return all affected elements to their normal state (remove placeholder
|
|
// value if present).
|
|
|
|
|
|
function disablePlaceholders(node) {
|
|
handleElem(node, hidePlaceholder);
|
|
} // Show the placeholder value on all appropriate elements.
|
|
|
|
|
|
function enablePlaceholders(node) {
|
|
handleElem(node, showPlaceholder);
|
|
} // Hide the placeholder value on a single element. Returns true if the
|
|
// placeholder was hidden and false if it was not (because it wasn't visible
|
|
// in the first place).
|
|
|
|
|
|
function hidePlaceholder(elem, keydownValue) {
|
|
var valueChanged = !!keydownValue && elem.value !== keydownValue;
|
|
var isPlaceholderValue = elem.value === elem.getAttribute(ATTR_CURRENT_VAL);
|
|
|
|
if ((valueChanged || isPlaceholderValue) && elem.getAttribute(ATTR_ACTIVE) === 'true') {
|
|
elem.removeAttribute(ATTR_ACTIVE);
|
|
elem.value = elem.value.replace(elem.getAttribute(ATTR_CURRENT_VAL), '');
|
|
elem.className = elem.className.replace(classNameRegExp, ''); // Restore the maxlength value. Old FF returns -1 if attribute not set.
|
|
// See GH-56.
|
|
|
|
var maxLength = elem.getAttribute(ATTR_MAXLENGTH);
|
|
|
|
if (parseInt(maxLength, 10) >= 0) {
|
|
elem.setAttribute('maxLength', maxLength);
|
|
elem.removeAttribute(ATTR_MAXLENGTH);
|
|
} // If the polyfill has changed the type of the element we need to change
|
|
// it back.
|
|
|
|
|
|
var type = elem.getAttribute(ATTR_INPUT_TYPE);
|
|
|
|
if (type) {
|
|
elem.type = type;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
} // Show the placeholder value on a single element. Returns true if the
|
|
// placeholder was shown and false if it was not (because it was already
|
|
// visible).
|
|
|
|
|
|
function showPlaceholder(elem) {
|
|
var val = elem.getAttribute(ATTR_CURRENT_VAL);
|
|
|
|
if (elem.value === '' && val) {
|
|
elem.setAttribute(ATTR_ACTIVE, 'true');
|
|
elem.value = val;
|
|
elem.className += ' ' + placeholderClassName; // Store and remove the maxlength value.
|
|
|
|
var maxLength = elem.getAttribute(ATTR_MAXLENGTH);
|
|
|
|
if (!maxLength) {
|
|
elem.setAttribute(ATTR_MAXLENGTH, elem.maxLength);
|
|
elem.removeAttribute('maxLength');
|
|
} // If the type of element needs to change, change it (e.g. password
|
|
// inputs).
|
|
|
|
|
|
var type = elem.getAttribute(ATTR_INPUT_TYPE);
|
|
|
|
if (type) {
|
|
elem.type = 'text';
|
|
} else if (elem.type === 'password' && changeType(elem, 'text')) {
|
|
elem.setAttribute(ATTR_INPUT_TYPE, 'password');
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
} // Returns a function that is used as a focus event handler.
|
|
|
|
|
|
function makeFocusHandler(elem) {
|
|
return function () {
|
|
// Only hide the placeholder value if the (default) hide-on-focus
|
|
// behaviour is enabled.
|
|
if (hideOnInput && elem.value === elem.getAttribute(ATTR_CURRENT_VAL) && elem.getAttribute(ATTR_ACTIVE) === 'true') {
|
|
// Move the caret to the start of the input (this mimics the behaviour
|
|
// of all browsers that do not hide the placeholder on focus).
|
|
moveCaret(elem, 0);
|
|
} else {
|
|
// Remove the placeholder.
|
|
hidePlaceholder(elem);
|
|
}
|
|
};
|
|
} // Returns a function that is used as a blur event handler.
|
|
|
|
|
|
function makeBlurHandler(elem) {
|
|
return function () {
|
|
showPlaceholder(elem);
|
|
};
|
|
} // Returns a function that is used as a submit event handler on form elements
|
|
// that have children affected by this polyfill.
|
|
|
|
|
|
function makeSubmitHandler(form) {
|
|
return function () {
|
|
// Turn off placeholders on all appropriate descendant elements.
|
|
disablePlaceholders(form);
|
|
};
|
|
} // Functions that are used as a event handlers when the hide-on-input
|
|
// behaviour has been activated - very basic implementation of the 'input'
|
|
// event.
|
|
|
|
|
|
function makeKeydownHandler(elem) {
|
|
return function (e) {
|
|
keydownVal = elem.value; // Prevent the use of the arrow keys (try to keep the cursor before the
|
|
// placeholder).
|
|
|
|
if (elem.getAttribute(ATTR_ACTIVE) === 'true' && keydownVal === elem.getAttribute(ATTR_CURRENT_VAL) && inArray(badKeys, e.keyCode)) {
|
|
if (e.preventDefault) {
|
|
e.preventDefault();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
};
|
|
}
|
|
|
|
function makeKeyupHandler(elem) {
|
|
return function () {
|
|
hidePlaceholder(elem, keydownVal); // If the element is now empty we need to show the placeholder
|
|
|
|
if (elem.value === '') {
|
|
elem.blur();
|
|
moveCaret(elem, 0);
|
|
}
|
|
};
|
|
}
|
|
|
|
function makeClickHandler(elem) {
|
|
return function () {
|
|
if (elem === safeActiveElement() && elem.value === elem.getAttribute(ATTR_CURRENT_VAL) && elem.getAttribute(ATTR_ACTIVE) === 'true') {
|
|
moveCaret(elem, 0);
|
|
}
|
|
};
|
|
} // Bind event handlers to an element that we need to affect with the
|
|
// polyfill.
|
|
|
|
|
|
function newElement(elem) {
|
|
// If the element is part of a form, make sure the placeholder string is
|
|
// not submitted as a value.
|
|
var form = elem.form;
|
|
|
|
if (form && typeof form === 'string') {
|
|
// Get the real form.
|
|
form = document.getElementById(form); // Set a flag on the form so we know it's been handled (forms can contain
|
|
// multiple inputs).
|
|
|
|
if (!form.getAttribute(ATTR_FORM_HANDLED)) {
|
|
addEventListener(form, 'submit', makeSubmitHandler(form));
|
|
form.setAttribute(ATTR_FORM_HANDLED, 'true');
|
|
}
|
|
} // Bind event handlers to the element so we can hide/show the placeholder
|
|
// as appropriate.
|
|
|
|
|
|
addEventListener(elem, 'focus', makeFocusHandler(elem));
|
|
addEventListener(elem, 'blur', makeBlurHandler(elem)); // If the placeholder should hide on input rather than on focus we need
|
|
// additional event handlers
|
|
|
|
if (hideOnInput) {
|
|
addEventListener(elem, 'keydown', makeKeydownHandler(elem));
|
|
addEventListener(elem, 'keyup', makeKeyupHandler(elem));
|
|
addEventListener(elem, 'click', makeClickHandler(elem));
|
|
} // Remember that we've bound event handlers to this element.
|
|
|
|
|
|
elem.setAttribute(ATTR_EVENTS_BOUND, 'true');
|
|
elem.setAttribute(ATTR_CURRENT_VAL, placeholder); // If the element doesn't have a value and is not focussed, set it to the
|
|
// placeholder string.
|
|
|
|
if (hideOnInput || elem !== safeActiveElement()) {
|
|
showPlaceholder(elem);
|
|
}
|
|
}
|
|
})(void 0);
|
|
|
|
},{}]},{},[1]);
|