Initial commit

README.md

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+# simple-highlight
+
+A small chromium extension to make highlighting pages on the fly easier.
+
+Designed to allow you to mark up a page with highlights then print it to PDF,
+instead of needing to print to PDF first and then highlight in your PDF reader.
+
+## What it does
+
+Select some text, then press _Alt+H_ and the text will be highlighted yellow.
+
+Right now, you can only highlight within a block of text. If you try to
+highlight across two paragraphs or similar, things will break and not look good.
+
+Also, you can't remove highlights yet, I still have to figure that one out too.

background.js

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+// background.js
+chrome.action.onClicked.addListener((tab) => {
+	chrome.scripting.executeScript({
+		target: {tabId: tab.id},
+		func: highlight,
+		args: [],
+	});
+});
+
+function highlight() {
+	let selection = document.getSelection();
+	if (selection.rangeCount <= 0) return;
+
+	// Perform the highlight
+	let mark = document.createElement("mark");
+	let range = selection.getRangeAt(0);
+	mark.appendChild(range.extractContents());
+	range.insertNode(mark);
+
+	// De-select text
+	selection.removeAllRanges();
+}

manifest.json

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+{
+    "manifest_version": 3,
+
+    "name": "simple-highlight",
+    "description": "Easily highlight text on a webpage.",
+    "version": "0.1.0",
+
+    "permissions": ["activeTab", "scripting"],
+    "host_permissions": ["<all_urls>"],
+
+    "background": {
+	    "service_worker": "background.js"
+    },
+
+    "action": {},
+
+    "commands": {
+	"_execute_action": {
+		"suggested_key": "Alt+H",
+		"description": "Highlight selected text."
+	}
+    }
+}