Add Prism Code Snippet In To A Website

Listen Audio
0:00 / 0:00
add prism code snippet in to a website image

This is an example of code snippet how it display the content of you code

(function () {

	if (typeof Prism === 'undefined' || typeof document === 'undefined') {
		return;
	}

	/**
	 * Plugin name which is used as a class name for 
 which is activating the plugin
	 *
	 * @type {string}
	 */
	var PLUGIN_NAME = 'line-numbers';

	/**
	 * Regular expression used for determining line breaks
	 *
	 * @type {RegExp}
	 */
	var NEW_LINE_EXP = /\n(?!$)/g;


	/**
	 * Global exports
	 */
	var config = Prism.plugins.lineNumbers = {
		/**
		 * Get node for provided line number
		 *
		 * @param {Element} element pre element
		 * @param {number} number line number
		 * @returns {Element|undefined}
		 */
		getLine: function (element, number) {
			if (element.tagName !== 'PRE' || !element.classList.contains(PLUGIN_NAME)) {
				return;
			}

			var lineNumberRows = element.querySelector('.line-numbers-rows');
			if (!lineNumberRows) {
				return;
			}
			var lineNumberStart = parseInt(element.getAttribute('data-start'), 10) || 1;
			var lineNumberEnd = lineNumberStart + (lineNumberRows.children.length - 1);

			if (number < lineNumberStart) {
				number = lineNumberStart;
			}
			if (number > lineNumberEnd) {
				number = lineNumberEnd;
			}

			var lineIndex = number - lineNumberStart;

			return lineNumberRows.children[lineIndex];
		},

		/**
		 * Resizes the line numbers of the given element.
		 *
		 * This function will not add line numbers. It will only resize existing ones.
		 *
		 * @param {HTMLElement} element A `
` element with line numbers.
		 * @returns {void}
		 */
		resize: function (element) {
			resizeElements([element]);
		},

		/**
		 * Whether the plugin can assume that the units font sizes and margins are not depended on the size of
		 * the current viewport.
		 *
		 * Setting this to `true` will allow the plugin to do certain optimizations for better performance.
		 *
		 * Set this to `false` if you use any of the following CSS units: `vh`, `vw`, `vmin`, `vmax`.
		 *
		 * @type {boolean}
		 */
		assumeViewportIndependence: true
	};

	/**
	 * Resizes the given elements.
	 *
	 * @param {HTMLElement[]} elements
	 */
	function resizeElements(elements) {
		elements = elements.filter(function (e) {
			var codeStyles = getStyles(e);
			var whiteSpace = codeStyles['white-space'];
			return whiteSpace === 'pre-wrap' || whiteSpace === 'pre-line';
		});

		if (elements.length == 0) {
			return;
		}

		var infos = elements.map(function (element) {
			var codeElement = element.querySelector('code');
			var lineNumbersWrapper = element.querySelector('.line-numbers-rows');
			if (!codeElement || !lineNumbersWrapper) {
				return undefined;
			}

			/** @type {HTMLElement} */
			var lineNumberSizer = element.querySelector('.line-numbers-sizer');
			var codeLines = codeElement.textContent.split(NEW_LINE_EXP);

			if (!lineNumberSizer) {
				lineNumberSizer = document.createElement('span');
				lineNumberSizer.className = 'line-numbers-sizer';

				codeElement.appendChild(lineNumberSizer);
			}

			lineNumberSizer.innerHTML = '0';
			lineNumberSizer.style.display = 'block';

			var oneLinerHeight = lineNumberSizer.getBoundingClientRect().height;
			lineNumberSizer.innerHTML = '';

			return {
				element: element,
				lines: codeLines,
				lineHeights: [],
				oneLinerHeight: oneLinerHeight,
				sizer: lineNumberSizer,
			};
		}).filter(Boolean);

		infos.forEach(function (info) {
			var lineNumberSizer = info.sizer;
			var lines = info.lines;
			var lineHeights = info.lineHeights;
			var oneLinerHeight = info.oneLinerHeight;

			lineHeights[lines.length - 1] = undefined;
			lines.forEach(function (line, index) {
				if (line && line.length > 1) {
					var e = lineNumberSizer.appendChild(document.createElement('span'));
					e.style.display = 'block';
					e.textContent = line;
				} else {
					lineHeights[index] = oneLinerHeight;
				}
			});
		});

		infos.forEach(function (info) {
			var lineNumberSizer = info.sizer;
			var lineHeights = info.lineHeights;

			var childIndex = 0;
			for (var i = 0; i < lineHeights.length; i++) {
				if (lineHeights[i] === undefined) {
					lineHeights[i] = lineNumberSizer.children[childIndex++].getBoundingClientRect().height;
				}
			}
		});

		infos.forEach(function (info) {
			var lineNumberSizer = info.sizer;
			var wrapper = info.element.querySelector('.line-numbers-rows');

			lineNumberSizer.style.display = 'none';
			lineNumberSizer.innerHTML = '';

			info.lineHeights.forEach(function (height, lineNumber) {
				wrapper.children[lineNumber].style.height = height + 'px';
			});
		});
	}

	/**
	 * Returns style declarations for the element
	 *
	 * @param {Element} element
	 */
	function getStyles(element) {
		if (!element) {
			return null;
		}

		return window.getComputedStyle ? getComputedStyle(element) : (element.currentStyle || null);
	}

	var lastWidth = undefined;
	window.addEventListener('resize', function () {
		if (config.assumeViewportIndependence && lastWidth === window.innerWidth) {
			return;
		}
		lastWidth = window.innerWidth;

		resizeElements(Array.prototype.slice.call(document.querySelectorAll('pre.' + PLUGIN_NAME)));
	});

	Prism.hooks.add('complete', function (env) {
		if (!env.code) {
			return;
		}

		var code = /** @type {Element} */ (env.element);
		var pre = /** @type {HTMLElement} */ (code.parentNode);

		// works only for  wrapped inside 
 (not inline)
		if (!pre || !/pre/i.test(pre.nodeName)) {
			return;
		}

		// Abort if line numbers already exists
		if (code.querySelector('.line-numbers-rows')) {
			return;
		}

		// only add line numbers if  or one of its ancestors has the `line-numbers` class
		if (!Prism.util.isActive(code, PLUGIN_NAME)) {
			return;
		}

		// Remove the class 'line-numbers' from the 
		code.classList.remove(PLUGIN_NAME);
		// Add the class 'line-numbers' to the 
		pre.classList.add(PLUGIN_NAME);

		var match = env.code.match(NEW_LINE_EXP);
		var linesNum = match ? match.length + 1 : 1;
		var lineNumbersWrapper;

		var lines = new Array(linesNum + 1).join('');

		lineNumbersWrapper = document.createElement('span');
		lineNumbersWrapper.setAttribute('aria-hidden', 'true');
		lineNumbersWrapper.className = 'line-numbers-rows';
		lineNumbersWrapper.innerHTML = lines;

		if (pre.hasAttribute('data-start')) {
			pre.style.counterReset = 'linenumber ' + (parseInt(pre.getAttribute('data-start'), 10) - 1);
		}

		env.element.appendChild(lineNumbersWrapper);

		resizeElements([pre]);

		Prism.hooks.run('line-numbers', env);
	});

	Prism.hooks.add('line-numbers', function (env) {
		env.plugins = env.plugins || {};
		env.plugins.lineNumbers = true;
	});

}());

 



Leave a non public comment how to improve it.



Characters Remaining

We are sorry for your bad experience. Leave a non public comment how to improve it.



Characters Remaining

Related Posts (5)

Search text box clear button image
using Line Numbers in code snippet   image
Email Verification using JavaScript image
CHECK FORM VALIDATION without loading a page using AJAX image
9th topics image

Search


Archives

No archives data found yet in 2016.

Find Us on Facebook

Subscribe for new updates



Back to Top