@loopback/docs/site/apidocs/context.comparebindingsbytag.md

Documentation for LoopBack 4

---
lang: en
title: 'API docs: context.comparebindingsbytag'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.context.comparebindingsbytag.html
---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [compareBindingsByTag](./context.comparebindingsbytag.md)

## compareBindingsByTag() function

Creates a binding compare function to sort bindings by tagged phase name.

<b>Signature:</b>

```typescript
export declare function compareBindingsByTag(phaseTagName?: string, orderOfPhases?: (string | symbol)[]): BindingComparator;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  phaseTagName | <code>string</code> | Name of the binding tag for phase |
|  orderOfPhases | <code>(string &#124; symbol)[]</code> | An array of phase names as the predefined order |

<b>Returns:</b>

`BindingComparator`

## Remarks

Two bindings are compared as follows:

1. Get values for the given tag as `phase` for bindings, if the tag is not present, default `phase` to `''`<!-- -->. 2. If both bindings have `phase` value in `orderOfPhases`<!-- -->, honor the order specified by `orderOfPhases`<!-- -->. 3. If a binding's `phase` does not exist in `orderOfPhases`<!-- -->, it comes before the one with `phase` exists in `orderOfPhases`<!-- -->. 4. If both bindings have `phase` value outside of `orderOfPhases`<!-- -->, they are ordered by phase names alphabetically and symbol values come before string values.