Code to use:
window.ZipteamsWidget.InitWidgetButton({
url: "XXXXX", prefill: { <Field label name>: <value> }
})
Sample code:
window.ZipteamsWidget.InitWidgetButton({
url: "https://zipme.at/zipteams/demo",
prefill: { 'Name': 'John Doe', 'Email': 'johndoe@email.com', 'Phone Number': '+919098998232' }
})