javascript - Object.create() says parameter is not an object -


description

in program reading json file, parsing object , try "cast" object of class projectfile using object.create().

code

let tmpfilecontent = fs.readfilesync(tmppath, {encoding: 'utf-8'}); let tmpobject = json.parse(tmpfilecontent); console.log(tmpobject); filelist[filelist.length] = object.create(projectfile, tmpobject);

log

log

question

when output tmpobject using console.log(tmpobject); says object in log. in line after try use object should casted object of class projectfile displays error message not object. doing wrong?

edit: projectfile class

class projectfile {   constructor(p_name, p_path, p_type, p_thumnailpath) {     this.name = p_name;     this.path = p_path;     this.thumnailpath = p_thumnailpath;   } }

edit 2: working code

let tmpfilecontent = fs.readfilesync(tmppath, {encoding: 'utf-8'});           let tmpobject = json.parse(tmpfilecontent);           console.log(tmpobject);           filelist[filelist.length] = object.create(projectfile, {             name: {               value: tmpobject.name,               writable: true,               enumerable: true,               configurable: true             },             path: {               value: tmpobject.path,               writable: true,               enumerable: true,               configurable: true             },             thumnailpath: {               value: tmpobject.thumnailpath,               writable: true,               enumerable: true,               configurable: true             }           });

object.create function gets prototype first parameter , property descriptors second parameter.

your second parameter has wrong type. need pass object, contains objects property attributes configurable, writable, enumerable , value it.

see example. in second case when pass parameter not apply desired shape, gives me same error.

const pr = { name: 'name' };  const successchild = object.create( pr, {    surname: {      value: 'surname',      writable: true,      enumerable: true,      configurable: true    }  });    console.log(successchild);    const errorchild = object.create( pr, {    name: 'error name',    surname: 'error surname'  });


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