The PDF Viewer library allows you to add signature in the signature field of the loaded PDF document programmatically using the formFieldClick event.
Step 1: Follow the steps provided in the link to create simple PDF Viewer sample in React.
Step 2: Add the following code snippet to add signature in signature field.
formFieldClick={this.fieldClick}
fieldClick(args) {
var viewer = document.getElementById('container').ej2_instances[0];
if (viewer) {
args.cancel = true;
if (args.field.type === 'SignatureField') {
var forms = viewer.formFieldCollections;
forms.map(r => {
if (r.id === args.field.id) {
console.log(args.field.value);
var el = document.getElementById(r.id);
if (el) {
if (el.style.textAlign !== 'center') {
el.style.textAlign = 'center';
}
if (el.style.fontStyle !== 'italic') {
el.style.fontStyle = 'italic';
}
if (el.style.fontWeight !== 'italic') {
el.style.fontWeight = 'italic';
}
if (args.field.value !== '' && args.field.value) {
args.field.value = '';
viewer.updateFormFieldsValue(args.field);
} else {
args.field.signatureType = ['Type'];
args.field.value = 'DA FIRMARE';
args.cancel = true;
viewer.updateFormFieldsValue(args.field);
}
}
}
});
}
}
}Find the Sample how to add signature in signature field