> ## Documentation Index > Fetch the complete documentation index at: https://docs-v2.adscrush.com/llms.txt > Use this file to discover all available pages before exploring further. # Web SDK > Lightweight JavaScript library for conversion tracking ## Installation ```html theme={null} ``` The SDK auto-initializes and captures the `tid` parameter from your URL. ## NPM (Optional) ```bash theme={null} npm install @adscrush/web-sdk ``` ```javascript theme={null} import AdsCrushSDK from '@adscrush/web-sdk' ``` ## Configuration (Optional) Set before loading the SDK: ```html theme={null} ``` The `domain` option is used by **both** `trackConversion()` and `trackLead()`. Per-call `domain` overrides take precedence over this config value. ## Manual Click ID ```javascript theme={null} AdsCrushSDK.setClickId('abc-123-def-456') ``` ## Verify ```javascript theme={null} console.log(AdsCrushSDK.getClickId()) // Click ID or null ``` **See also:** [Track Clicks](/sdk/track-click) · [Track Conversions](/sdk/track-conversion) · [Track Leads](/sdk/track-lead) · [API Reference](/sdk/api-reference) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.