我创建了一个todo应用程序,但是当我在应用程序中显示虚拟数据时,它显示了这个错误。 Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.
You likely forgot to export your component from the file it's defined in, or you might have mixed up default
我将react-native更新为v0.57,react-native run-ios失败了。我按照babel-preset-react-native中的建议,用metro-react-native-babel-preset代替了。这是我正在获得的错误堆栈跟踪。
error: bundling failed: Error: Cannot find module 'babel-preset-react-native' from '/Users/buraktas/workspace/reactnative'
- If you want to resolve "
最近在stackoverflow上摆弄了这个问题: Dynamically arrange elements around circle 但是这个解决方案包括jquery和$( this )关键字。我想转换这段代码: function distributeFields(deg) {
deg = deg || 0;
var radius = 200;
var fields = $('.field'), container = $('#container'),
width = container.width(), heigh