Chart.js examples

• Chart.js Highlight Line
• Chart.js Vertical Hover Line
• Chart.js Reference Line
• Chart.js Vertical Hover Scale
• Chart.js Zooming Time Scale

D3.js examples

• D3.js Area Chart
• D3.js Heatmap
• D3.js Family Tree - youtube as a reference

QRCode's

• QRCode.js Basic Usages
• Html5-QRCode Easy Mode Scanner
• Html5-QRCode Pro Mode Scanner