### Clear QR Code Display with clear() Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Removes the currently rendered QR code from the DOM element. This method is useful for resetting the QR code display, for example, before generating a new one or when it's no longer needed. ```html

``` -------------------------------- ### Basic QRCode Initialization Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Initializes a QRCode instance with a target DOM element and the text to encode. Uses default settings for size, color, and error correction. ```html

``` -------------------------------- ### Advanced QRCode Initialization with Options Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Creates a QRCode instance with custom options for text, dimensions, colors, and error correction level. Error correction levels range from L (Low) to H (High). ```html

``` -------------------------------- ### QRCode Constructor Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Initializes a new QRCode instance attached to a DOM element. Supports basic string input or an advanced configuration object. ```APIDOC ## QRCode Constructor ### Description Creates a new QRCode instance attached to a DOM element. Can be initialized with a simple string or an options object for advanced customization. ### Parameters #### Request Body - **el** (HTMLElement or string) - Required - The DOM element or ID string where the QR code will be rendered. - **options** (string or object) - Required - Either the text string to encode or an object containing configuration settings. - **text** (string) - Optional - The content to encode. - **width** (number) - Optional - Width in pixels (default: 256). - **height** (number) - Optional - Height in pixels (default: 256). - **colorDark** (string) - Optional - Dark module color (default: "#000000"). - **colorLight** (string) - Optional - Light module color (default: "#ffffff"). - **correctLevel** (number) - Optional - Error correction level (L, M, Q, H). ``` -------------------------------- ### Initialize and Generate QR Code Source: https://github.com/davidshimjs/qrcodejs/blob/master/index.html Initializes a QRCode instance and defines a function to update the QR code based on input field values. Includes event listeners for blur and keydown events to trigger generation. ```javascript var qrcode = new QRCode(document.getElementById("qrcode"), { width : 100, height : 100 }); function makeCode () { var elText = document.getElementById("text"); if (!elText.value) { alert("Input a text"); elText.focus(); return; } qrcode.makeCode(elText.value); } makeCode(); $("#text"). on("blur", function () { makeCode(); }). on("keydown", function (e) { if (e.keyCode == 13) { makeCode(); } }); ``` -------------------------------- ### makeCode() Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Updates the existing QR code instance with new content. ```APIDOC ## makeCode(text) ### Description Replaces the current QR code with a new one encoding the specified text, maintaining the original configuration settings. ### Parameters - **text** (string) - Required - The new text content to encode. ``` -------------------------------- ### QR Code Generation with Options Source: https://github.com/davidshimjs/qrcodejs/blob/master/README.md Configures QR code appearance and error correction levels by passing an options object during initialization. ```html

``` -------------------------------- ### Basic QR Code Generation Source: https://github.com/davidshimjs/qrcodejs/blob/master/README.md Initializes a QR code within a target DOM element using a simple string URL. ```html

``` -------------------------------- ### QR Code Instance Methods Source: https://github.com/davidshimjs/qrcodejs/blob/master/README.md Manipulates an existing QR code instance to clear the display or generate a new code. ```javascript qrcode.clear(); // clear the code. qrcode.makeCode("http://naver.com"); // make another code. ``` -------------------------------- ### Generate QR Code with SVG Source: https://github.com/davidshimjs/qrcodejs/blob/master/index-svg.html Instantiates a QRCode generator and sets up event listeners to generate a QR code based on user input. Requires an HTML element with id 'qrcode' for the QR code and an input element with id 'text' for the data. Uses SVG for rendering. ```javascript var qrcode = new QRCode(document.getElementById("qrcode"), { width : 100, height : 100, useSVG: true }); function makeCode () { var elText = document.getElementById("text"); if (!elText.value) { alert("Input a text"); elText.focus(); return; } qrcode.makeCode(elText.value); } makeCode(); $("#text"). on("blur", function () { makeCode(); }). on("keydown", function (e) { if (e.keyCode == 13) { makeCode(); } }); ``` -------------------------------- ### Implement Interactive QR Code Generator Source: https://context7.com/davidshimjs/qrcodejs/llms.txt A full HTML implementation requiring jquery.min.js and qrcode.js. It supports dynamic resizing, error correction adjustment, and event-based updates. ```html

QR Code Generator

``` -------------------------------- ### Generate New QR Code with makeCode() Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Updates an existing QRCode instance to generate a new QR code with specified text. This method is useful for dynamically changing the QR code content without reinitializing the instance. ```html

``` -------------------------------- ### Render QR Codes as SVG Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Enable vector output by setting the useSVG option to true. This works with both SVG elements and standard div containers. ```html

``` -------------------------------- ### Apply Custom Colors to QR Codes Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Customize the appearance of QR codes by defining colorDark and colorLight properties. High error correction levels are recommended for branded codes. ```html

Default (Black/White)

Custom Green Theme

Dark Theme

``` -------------------------------- ### clear() Source: https://context7.com/davidshimjs/qrcodejs/llms.txt Removes the rendered QR code from the DOM. ```APIDOC ## clear() ### Description Clears the rendered QR code from the associated DOM element, removing all canvas or table elements. ``` -------------------------------- ### Generate QR Codes with Different Error Correction Levels Source: https://context7.com/davidshimjs/qrcodejs/llms.txt This HTML and JavaScript code generates four QR codes with varying error correction levels (L, M, Q, H). Each level offers a different balance between scannability robustness and data capacity. Choose the level based on the expected environment and data requirements. ```html

Level L (7%)

Level M (15%)

Level Q (25%)

Level H (30%)

``` === COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.