List all of a features fields and values in a popup in Leaflet

allFieldsPopup.js

function allFieldsPopup(feature, layer) {
    let featureProperties = feature.properties;
    let popupHtml = '';
    for(let property in featureProperties) {
       popupHtml+=`<b>${property}:</b> ${featureProperties[property]}<br>`
    }
    layer.bindPopup(popupHtml)
}