Error concatenating string in jquery

Because you are already using single quotation marks in onclick , you can not use the same for the parameters. Use the double quotation marks and escape:

linha += "<td><a href='#' onclick='excluiFeira(" + json[key].id +
", \"" + json[key].descricao + "\")'>Excluir</a></td>";

I advise you to use Template literals that ends up getting a lot easier to build the strings you want.

In your case it would look like this:

linha += '<td><a href="#" onclick="excluiFeira(${json[key].id},'${json[key].descricao}')">Excluir</a></td>';

Differences to highlight using template literals:

• The delimiters now become the ' which means that you do not have to escape ' with \' or escape " with \"
• Each time you need to put a value inside the string it does ${valor}
• These strings are also multiline which allows you to split text between several lines if needed.

See this example:

let key = 'chave';
let json = {
  chave: {
    id: 36,
    descricao: "teste"
  }
};

let linha = '<td><a href="#" onclick="excluiFeira(${json[key].id},'${json[key].descricao}')">Excluir</a></td>';
console.log(linha);