Working with SharePoint rest using REST api and browser console

Get-List-Fields.js

// Get SharePoint List Fields in a table
function getListSchema(listName) {
    var siteUrl = _spPageContextInfo.webAbsoluteUrl;
    var endpointUrl = `${siteUrl}/_api/web/lists/getbytitle('${listName}')/fields?$filter=Hidden eq false`;

    fetch(endpointUrl, {
        method: 'GET',
        headers: {
            'Accept': 'application/json;odata=nometadata',
            'Content-Type': 'application/json;odata=verbose',
        },
        credentials: 'same-origin'  // Needed for SharePoint On-Premise
    })
    .then(response => {
        if (!response.ok) {
            throw new Error('Network response was not ok ' + response.statusText);
        }
        return response.json();
    })
    .then(data => {
        var fields = data.value;
        var availableFields = fields.map(field => {
            return {
                Title: field.Title,
                TypeDisplayName: field.TypeDisplayName,
                EntityPropertyName: field.EntityPropertyName,
                Hidden: field.Hidden,
                Required: field.Required,
                ReadOnlyField: field.ReadOnlyField,
                CanBeDeleted: field.CanBeDeleted,
                SchemaXml: field.SchemaXml,
            }
        });
        renderTable(availableFields);
    })
    .catch(error => {
        console.error('There has been a problem with your fetch operation:', error);
    });
}

function renderTable(data) {
    let table = '';
    let headers = Object.keys(data[0]);
    table += headers.join('\t') + '\n';
    data.forEach(item => {
        let row = [];
        headers.forEach(header => {
            row.push(item[header]);
        });
        table += row.join('\t') + '\n';
    });
    console.log(table);
}

// Call the function to get the list schema
getListSchema('Issue tracker');