在开发模式下渲染出的 Angular
页面包含了很多形如下图ng-reflect-的html属性,很多时候其值都为[object Object].
如果处于调试目的,需要在Chrome开发者工具里观察这些值的具体内容,可以采取本文介绍的一个小技巧:

- normalizeDebugBindingName
- normalizeDebugBindingValue
function normalizeDebugBindingName(name) {
// Attribute names with `$` (eg `x-y$`) are valid per spec, but unsupported by some browsers
name = camelCaseToDashCase(name.replace(/[$@]/g, '_'));
return `ng-reflect-${name}`;
}
const CAMEL_CASE_REGEXP = /([A-Z])/g;
function camelCaseToDashCase(input) {
return input.replace(CAMEL_CASE_REGEXP, (...m) => '-' + m[1].toLowerCase());
}
function normalizeDebugBindingValue(value) {
try {
// Limit the size of the value as otherwise the DOM just gets polluted.
return value != null ? value.toString().slice(0, 30) : value;
}
catch (e) {
return '[ERROR] Exception while trying to serialize the value';
}
}