Enable Backspace

Enables Backspace Navigation on websites that have no input controls

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// ==UserScript==
// @name         Enable Backspace
// @namespace    57d19fe242d8f71046717e057d2001777cd16953
// @version      0.1
// @description  Enables Backspace Navigation on websites that have no input controls
// @author       /u/AyrA_ch
// @include      *
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function () {
	'use strict';
	//checks if elements are present that need backspace
	var hasInput = function () {
		return !!document.querySelector("input,textarea");
	};

	document.addEventListener("keydown", function (e) {
		//Only go back if the key is correct and no elements are present that use backspace
		if (e.keyCode === 8 && !hasInput()) {
			e.preventDefault();
			e.stopPropagation();
			history.back();
		}
	});
})();

/*
LICENSE:
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The full license text can be found here: http://creativecommons.org/licenses/by-nc-sa/4.0/
The link has an easy to understand version of the license and the full license text.

DISCLAIMER:
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.
*/

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